Sodium - 2Na + 2H2O → ______+ _______ [g], Magnesium - Mg + H2O → ______+ _______ [g], Aluminium - 2Al + 3H2O → ______+ _______ [g], Iron - 3Fe + 4H2O ⇌ ______+ _______ [g], Magnesium - Mg + 2HCl → ______+ _______ [g], Aluminium - 2Al + 3H2SO4 → ______+ _______ [g], Reactions of metals - alkali [conc. Electronic Configuration: Like all the elements of the group, Hydrogen also has one electron in its last shell, the valence shell. no. They react with metals to form metal halides, and with hydrogen to form acidic hydrogen halides. Atoms of group 7 elements all have seven electrons in their outer shell. Helium .. Does taking hydrogen from water for energy deplete water supplies. 1 decade ago. How can you obtain hydrogen from sodium hydroxide [not by electrolysis]. State what is reducing agent. Metals have a tendency to lose electrons. I did some research and found a few science magazine articles. This is one of the factors that dictates the position of hydrogen in the table. Share 0. State what is oxidising agent. What do the following symbols [or formula] denote : 2H ; H2 ; H+. Hydrogen is a very special case, since it is the simplest element. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Write down the “word equation” for the following reaction: Explain briefly how hydrogen is manufactured on a large scale, from steam. Na (Z=11): K 2, L 8, M 1 1 0. Lv 4. There are also heavier isotopes, which are all synthetic and have a half-life less than one zeptosecond (10 −21 second). james harrington asked the Naked Scientists: Dear Dr. Chris, I'm a GCSE chemistry student (taking it through to AS and A level) and i've always been puzzled why hydrogen is in group 1 of the periodic table (with the alkali metals). Write balanced equation of the reaction in the preparation of : hydrogen from a solution of potassium hydroxide [other than by electrolysis]. Sodium hydroxide + zinc → hydrogen + _________, Calcium + water → calcium hydroxide + _________. Thus it can lose an electron to achieve a stable configuration like alkali metals and hence can be placed in group 1 (alkali metals). The questions involved in Viraf J. Dalal Solutions are important questions VIEW SOLUTION. Making predictions . 1 decade ago. Chlorine, bromine and iodine are all halogens. State the condition and give balanced equation for the conversion of coke to water gas. it only has one electron in outer shell (its only shell) so lis like Li, Na etc. 0 0. ecleeze. Page created in 0.121 seconds with 54 queries. State what difference will be seen if pure zinc is added in the distillation flask ‘X’ instead of granulated zinc. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images. Hydrogen is a nonmetal.Hydrogen is in Group 1 of the Periodic Table, because it has the same . Because Hydrogen only has 1 electron, it has 1 electron on it's outer shell. State why hydrogen is not prepared in the laboratory by the action of calcium with dilute sulphuric acid. that can be asked in the final exam. Describe one chemical test applied to the following gases, which would enable you to distinguish between them :‘carbon monoxide and hydrogen’. Atomic Number – Protons, Electrons and Neutrons in Hydrogen. Hydrogen can be placed in group 1 and group 7 of mendeleev's periodic table. please remember ther is some space between the group 1A and Hydrogen. Hydrogen forms both positive ions like alkali metals (group 1) and negative ions like halogens (group 7). Explain the term oxidation in term of addition and removal of oxygen/hydrogen with a suitable example. The hydrogen ignites immediately during the reaction between potassium and water with the potassium producing a lilac coloured flame. Hydrogen can easily lose an electron. In Mendeleev"s Periodic table, the position of hydrogen was not clear. A metal which cannot be used for the preparation of hydrogen using dilute acids. Hydrogen only needs 2 (or 0) electrons to be stable. Afraid I can't tell you much about it, just, http://www.newscientist.com/article/mg12316713.900-science-hydrogen-becomes-a-metal-under-pressure-.html, http://physicsworld.com/cws/article/news/5307, Quote from: james harrington  on 21/04/2009 00:30:02, Quote from: Chemistry4me on 21/04/2009 01:51:39, Quote from: Chemistry4me on 21/04/2009 01:57:39, Quote from: Chemistry4me on 21/04/2009 02:06:59, Would liquid hydrogen float on liquid helium. The word "alkali" received its name from the Arabic word "al qali," meaning "from ashes", which since these elements react with water to form hydroxide ions, creating alkaline solutions (pH>7). In the laboratory preparation of hydrogen from zinc and dil. Name a solution which absorbs the impurity – `"H"_2"S"`. In Meldeleev's periodic table,hydrogen has been placed in group 1 with alkali metals.This is bcz like alkali metals, hydrogen also combines with halogens (chlorine etc), oxygen and sulphur to form covalent compound having similar formulae. With special reference to valency electrons & ion formation. Its chemical formula is written as H 2 O 2. State, why hydrogen is collected after all the air in the apparatus, is allowed to escape. State why hydrogen is not prepared in the laboratory by the action of lead with dilute hydrochloric acid. Thus it can lose an electron to achieve a stable configuration like alkali metals and hence can be placed in group 1 (alkali metals). With a standard atomic weight of 1.008, hydrogen is the lightest element in the periodic table.Hydrogen is the most abundant chemical substance in the universe, constituting roughly 75% of all baryonic mass. Volatile simply means being readily able to be vaporized at low temperatures. Reactivity. The first major group is covalent hydrides, which is when a hydrogen atom and one or more non-metals form compounds. On the basis of electronegativity, it is tempting to classify hydrogen as a semimetal, as shown in the three-dimensional graph of the electronegativities of the main-group elements shown below. But in case of hydrogen. The rest of the elements in this group are usually known as the "alkaline metals", but hydrogen is not generally described this way. They react with metals to form metal halides, and with hydrogen to form acidic hydrogen halides. 1 Answer. This occurs when hydrogen covalently bonds to a more electropositive element by sharing electron pairs. How can you obtain hydrogen from a mixture of hydrogen and carbon monoxide? They are reactive non-metals and are always found in compounds with other elements. it is placed ABOVE the group and not as … First and foremost reason being that it is similar to alkali metals in electronic configuration(1s1) i.e. Maximum students of CISCE Class 9 prefer Viraf J. Dalal Textbook Solutions to score more in exam. Hydrogen is a nonmetal and is placed above group in the periodic table because it has ns 1 electron configuration like the alkali metals. Hydrogen is the chemical element with the symbol H and atomic number 1. This means that hydrogen resembles alkali metal in some of the properties.Hydrogen also resembles halogens in some of the properties. Non-remnant stars are mainly composed of hydrogen in the plasma state.The most common isotope of hydrogen, termed … 2 Answers. Viraf J. Dalal solutions for Class 9 Simplified ICSE Chemistry chapter 6 (Study Of The First Element — Hydrogen) include all questions with solution and detail explanation. ©The Naked Scientists® 2000–2017 | The Naked Scientists® and Naked Science® are registered trademarks created by Dr Chris Smith. Hydrogen’s position was not justified in the very old Mendeleev’s periodic table. How does hydrogen occur in the combined state. Potassium and sodium are not used to react with dilute ‘hydrochloric acid or dilute sulphuric acid in the laboratory preparation of hydrogen. Anonymous. The first major group is covalent hydrides, which is when a hydrogen atom and one or more non-metals form compounds. Interestingly, it can be placed in the first group or the 7th group (a bit of a stretch but let me explain) The first group of the periodic table represents elements with a single valence electron in an s orbital. Give a balanced equation for the following conversions sodium plumbite from lead. Name a gas which burns in air or oxygen forming water. Give an example of oxidising agent in the gaseous, liquid, and solid form. State the products of the reaction “when steam is passed over red-hot iron”. Resemblance with alkali metals Group 7 - the halogens The group 7 elements are all reactive non-metals. It has a higher viscosity than water. Granulated zinc is preferred to metallic zinc in the preparation of hydrogen using dilute acid. 2) In some other properties, hydrogen resembles halogens.As such, it can be placed in group 17 along with halogens. Share with your friends. Li (z=3) : K 2, L 1. Favourite answer. Viraf J. Dalal textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students. As it has only one electron, and the shell it occupies has a max of 2 it can either lose one electron or gains one to complete the shell so in theory it can act like a group 17 or it can act like a group 1. Give a balanced equation for the following conversions sodium aluminate from aluminium. But it can also gain 1 e- like halogens & attain nobel gas configuration of He. Steam using a metal – and the reaction is reversible. Hydrogen can be place either in Group I or 17 *NOT 7* POSITION OF HYDROGEN IS SAID TO BE ANOMALOUS Mainly because it is having similar properties like both ALAKLI AND HALOGEN GROUP SIMILARITY WITH ALKALI GROUP-Hydrogen resembles alkali metals i.e. What can go higher, a hydrogen-filled balloon, or a hot air balloon? [two atoms, molecule, ion], Write a correctly balanced equation for the following “word equation”:calcium + water → calcium hydroxide + hydrogen. A gaseous reducing agent which is basic in nature. 1) In some properties it resembles alkali metals.As such, it can be placed in group 1 of the periodic table along with alkali metals. The Group 7 elements are known as the halogens. Reactivity decreases down the group. Why? myfedex18. in column 1. it only needs one electron ot complete shell like the halogen in group 7 . (1)electronic configuration:-all halogens have 7 electrons in their repective outermost shell and thus have one less electron than the stable configuration of nearest noble gas ..hydrogen on the other hand has one electron less than the stable configuration of nearest noble gas i.e. Chris. Which has a lower boiling point, liquid hydrogen or liquid helium? Explanation : H (Z=1): K 1. it can do both as if it loses 1 it will lose existence and if it gains one it will form either hydride or helium . A mixture of hydrogen and chlorine can be separated by passage through a porous pot. Electronic Configuration: Like all the elements of the group, Hydrogen also has one electron in its last shell, the valence shell. Two jars of H2 are collected – “one burns quietly and the other does not”. Class-10 » Science. Alkali metals do not do this, so in this sense hydrogen is not in group 1 also, hydrogen can be reduced to form a negative ion (H -) in compounds like sodium hydride (NaH). Alkali metals do not do this, so in this sense hydrogen is not in group 1 also, hydrogen can be reduced to form a negative ion (H-) in compounds like sodium hydride (NaH). 0 1. ns1 electron configuration as the alkali metals. Of these, 5 H is the most stable, and 7 H is the least. Give the general group characteristic applied to hydrogen with respect to similarity in properties of hydrogen with alkali metals of group 1 [IA]. Hydrogen forms both positive ions like alkali metals (group 1) and negative ions like halogens (group 7). Like the res of column 17, it only takes 1 e- to make it stable The alkali metals cannot do this. elements in group I-A. These hydrides can be volatile or non-volatile. Whilst hydrogen do not exactly fit in group 1 as an "alkali metal" (it's a gas instead of a metal, except in special conditions, it forms negatively-charged ions, and it is far less electropositive than lithium), it absolutely cannot be a halogen. Properties of Hydrogen . Lv 7. Hydrogen (1 H) has three naturally occurring isotopes, sometimes denoted 1 H, 2 H, and 3 H. The first two of these are stable, while 3 H has a half-life of 12.32 years. Write correctly the balanced equation for the following: ‘When zinc filings are added to a concentrated solution of sodium hydroxide’. Hydrogen and alkali metals of group 1 [IA] react with copper [II] oxide to give copper. Started by jeffreyHBoard Physics, Astronomy & Cosmology, Started by nudephilBoard Physics, Astronomy & Cosmology. “The reaction between steam and red-hot iron is a Reversible Reaction.” What is meant by this statement. Relevance. Explain the term redox reaction with an example involving the reaction of hydrogen sulphide with chlorine. Hydrogen can be placed in both group 1 and group 17 because its electronic configuration is similar to both the groups. Thus, it can be placed in both group 1 and group 7. Hydrogen is the only electro-positive non metal and it has valency of 1.formula of hydrogen when reacts with oxygen is water this is the one of the main reason for placing the hydrogen in group i.Group 1 because it has only one 1 shell,Period 1 because it has one electron on its last shell. Write correctly balanced equation for the following: When steam is passed over red hot iron. Helium .. Reactivity of Group 1 Elements. A compound formed between hydrogen and an element from group 17 [VIIA] – period 3. Hydrogen is at the top of the first column in the periodic table, so it is in "Group 1". Share with your friends. Hydrogen is an oddball, thats why is has its own space next to helium. How would you obtain ‘hydrogen from sodium hydroxide’ solution other than by electrolysis? When steam is passed over red-hot iron, magnetic oxide of iron and hydrogen are obtained. Non-remnant stars are mainly composed of hydrogen in the plasma state. ], Aluminium - 2Al + 2NaOH + 2H2O → ______ + _______ [g], Zinc oxide - ZnO + H2 → ________ + ______, Iron [III] oxide - Fe2O3 + 3H2 → ________ + ______. Give balanced equation for obtaining hydrogen from cold water using a divalent active metal. Give a reason for the following: Dilute nitric acid is not preferred as the reactant acid. The salt formed when aluminium reacts with potassium hydroxide, during the preparation of hydrogen from alkalis. Favorite Answer. soln. Lv 7. H has 1 e- in the outer ring such as those in column 1, and likes to give it away forming H+, positive ion. Na (z=11) : K 2, L 8, M 1. (Therefor classed in group 1) The element, which like hydrogen has one valence electron. The element which forms a diatomic molecule. Using Viraf J. Dalal Class 9 solutions Study Of The First Element — Hydrogen exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. New questions in Chemistry. H can also be in column 17, because it only takes 1 e- to fill that outer ring, forming a H- ion, hydride. Give a reason why hydrogen can be placed in group 1 [1A] and group 17 [VIIA] of the periodic table. Thus, it can be placed in both group 1 and group 7. Chlorine, bromine and iodine are all halogens. (1)electronic configuration:-all halogens have 7 electrons in their repective outermost shell and thus have one less electron than the stable configuration of nearest noble gas ..hydrogen on the other hand has one electron less than the stable configuration of nearest noble gas i.e. Hydrogen shares many similarities with alkali metals, i.e. Hydrogen peroxide is a chemical compound containing molecules of hydrogen and water. This means that the halogens all have similar chemical reactions. Let us take a look at the similarities. Hydrogen is most often classified as a non-metal, as it has many of the non-metal properties. Give the general group characteristic applied to hydrogen with respect to similarity in properties of hydrogen with alkali metals of group 1 [IA]. This occurs when hydrogen covalently bonds to a more electropositive element by sharing electron pairs. Firstly, electronegativity decreases as you go down the periodic table, and the element becomes more and more metallic. Like group I elements, hydrogen has only one electron in its valence shell. State the electronic configuration of hydrogen [at. Give an example of oxidising agent in the gaseous, liquid, and solid form. james harrington asked the Naked Scientists: Dear Dr. Chris, I'm a GCSE chemistry student (taking it through to AS and A level) and i've always been puzzled why hydrogen is in group 1 of the periodic table (with the alkali metals). What do you observe when a piece of sodium is dropped into cold water? Give balanced equation for the following conversion: Zinc to sodium zincate – using an alkali. Give the general group characteristic applied to hydrogen with respect to similarity in properties of hydrogen with halogens of group 17 [VIIA].With special reference to valency electrons & ion formation. In fact, they are the most reactive metals and, along with the elements in group 17, are the most reactive of all elements. 9 years ago. Hydrogen can be placed in group 1 and group 7 of mendeleev's periodic table Why - Science - NCERT Solutions; Board Paper Solutions; Ask & Answer; School Talk; Login; GET APP; Login Create Account. Hydrogen resembles the elements of group I-A, IV-A and VII-A in some respects. Hydrogen is considered as a very unique element.The position of this small element in the periodic table is debatable. Please update your bookmarks accordingly. Does hydrogen have a �radiant state� and a �steady state�? State the condition and give balanced equation for the conversion of water gas to hydrogen – in the Bosch process. Hydrogen is a chemical element with atomic number 1 which means there are 1 protons in its nucleus.Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z.The total electrical charge of the nucleus is therefore +Ze, where e (elementary charge) equals to 1,602 x 10-19 coulombs. They could have just as easily chucked it into group 17 eh? For ex, like … I did some research and found a few science magazine articles. Write balanced equation for the following reaction: magnesium + dil. Further, we at Shaalaa.com provide such solutions so that students can prepare for written exams. The Group 7 elements are known as the halogens. Helium .. Why is copper not used to prepare hydrogen by the action of dilute hydrochloric acid or dilute sulphuric acid on the metal, [copper [Cu] below hydrogen – no reaction]. Select the correct answer from the symbol in the bracket. Li , K , Na , K, Rb ,Cs and Fr of group 1 of the periodic table. When hydrogen peroxide is in its pure form it is usually seen as a clear liquid with a slight pale blue colouration. The element other than hydrogen, which forms a molecule containing a single covalent bond. acid. Explain the term reduction in term of addition and removal of oxygen/hydrogen with a suitable example. The group 7 elements are all reactive non-metals. Though lead is above hydrogen in the activity series, it does not react with dilute hydrochloric acid or dilutes sulphuric acid. Hydrogen conducts electricity in liquid form just like a metal does. On newer periodic tables, that is 1 and 17. It is in group 1 … 0 Members and 1 Guest are viewing this topic. The diagram represent the preparation and collection of hydrogen by a standard laboratory method. Let us take a look at the composition of valence shells of a few of these alkali metals. Concepts covered in Class 9 Simplified ICSE Chemistry chapter 6 Study Of The First Element — Hydrogen are Position of the Non-metal (Hydrogen) in the Periodic Table, Hydrogen from Alkalies, Laboratory Preparation of Hydrogen, Hydrogen from Water, Hydrogen from Dilute Acids, Application of Activity Series in the Preparation of Hydrogen, Similarities Between Hydrogen and Halogens, Preparation of Hydrogen, Concept of Hydrogen, Properties and Uses of Hydrogen, Hydrogen - Oxidation and Reduction, Manufacture of Hydrogen, Preparation of Hydrogen, from Water – Electrolysis, Preference of Zinc as the Metal to Be Used (With Reasons).. They are reactive non-metals and are always found in compounds with other elements. 3) In some hydrogen differs from both alkali metals and halogens. In this sense, hydrogen is more like a halogen and so you could say it is in group 7 but in Theoretical calculations predict that hydrogen can behave like a metal at a pressure of 500 000 atm. In fact, they are the most reactive metals and, along with the elements in group 17, are the most reactive of all elements. Hydrogen can be in both group 1 and group 7 due to it's valence shell. ‘Magnesium reacts with very dilute nitric acid at low temperatures liberating hydrogen.’ Give reasons. Still have questions? The element placed below hydrogen in group 1 [IA]. Li (Z=3): K 2, L 1. The element, which like hydrogen is a strong reducing agent. How did the name ‘hydrogen’ originate. IT IS JUST PLACED ABOVE group 1 of th table as it has valency one and cannot be placed with halogens as it has just one valence electron. Get the free view of chapter 6 Study Of The First Element — Hydrogen Class 9 extra questions for Class 9 Simplified ICSE Chemistry and can use Shaalaa.com to keep it handy for your exam preparation, Chapter 6: Study Of The First Element — Hydrogen, Chapter 4: Atomic Structure & Chemical Bonding, CBSE Previous Year Question Paper With Solution for Class 12 Arts, CBSE Previous Year Question Paper With Solution for Class 12 Commerce, CBSE Previous Year Question Paper With Solution for Class 12 Science, CBSE Previous Year Question Paper With Solution for Class 10, Maharashtra State Board Previous Year Question Paper With Solution for Class 12 Arts, Maharashtra State Board Previous Year Question Paper With Solution for Class 12 Commerce, Maharashtra State Board Previous Year Question Paper With Solution for Class 12 Science, Maharashtra State Board Previous Year Question Paper With Solution for Class 10, CISCE ICSE / ISC Board Previous Year Question Paper With Solution for Class 12 Arts, CISCE ICSE / ISC Board Previous Year Question Paper With Solution for Class 12 Commerce, CISCE ICSE / ISC Board Previous Year Question Paper With Solution for Class 12 Science, CISCE ICSE / ISC Board Previous Year Question Paper With Solution for Class 10. Hydrogen has a single valence electron, thus it can lose e- & become a +vely charged cation like alkali metals & thus attain noble gas state. Additional Questions | Q 2.1. I asked my teacher if hydrogen is a metal and he gave me a straight no. Like group I elements, hydrogen has only one electron in its valence shell. However, in group 1, hydrogen shares properties with the alkaline metals. However, it varies greatly from the alkali metals as it forms cations (H +) more reluctantly than the other alkali metals.Hydrogen‘s ionization energy is 1312 kJ/mol, while lithium (the alkali metal with the highest ionization energy) has … Element Hydrogen (H), Group 1, Atomic Number 1, s-block, Mass 1.008. Share 0. Complete and balance the following equations: What do the following symbols represent : 2H and H2. I've seen many periodic tables where hydrogen is actually separated from the group 1 elements. You should put "no group", but explain why. Hydrogen is a nonmetal and is placed above group in the periodic table because it has ns 1 electron configuration like the alkali metals. On the basis of electronegativity, it is tempting to classify hydrogen as a semimetal, as shown in the three-dimensional graph of the electronegativities of the main-group elements shown below. Properties of hydrogen do not completely match any one of the above-mentioned groups. That is why position of hydrogen is still undecided. Name an element whsich reacts violently with water at room temperature. State why hydrogen is not prepared in the laboratory by the action of sodium with cold water. Describe briefly, with equations, the Bosch Process for the large scale production of hydrogen. H (z=1) : K 1. (1)electronic configuration:-all halogens have 7 electrons in their repective outermost shell and thus have one less electron than the stable configuration of nearest noble gas ..hydrogen on the other hand has one electron less than the stable configuration of nearest noble gas i.e. Give a balanced equation for the following conversion. Thus, it has metallic character. They react with metals to form metal halides, and with hydrogen to form acidic hydrogen halides. Resemblance Of Hydrogen With Alkali Metals(Group I-A) 1) … Give a balanced equation for obtaining hydrogen from? … VIEW SOLUTION. hydrogen can be placed in group 1 and 7 true/false?and why?.? Source(s): Soc. hydrochloric acid → ___. In Mendeleev"s Periodic table, the position of hydrogen was not clear. Get answers by asking now. The diagram represent the preparation and collection of hydrogen by a standard, State what is added through the thistle funnel ‘Y’. Hydrogen also has an electronegativity (EN = 2.20) halfway between the extremes of the most electronegative (EN = 3.98) and least electronegative (EN = 0.7) elements. 1 0. science teacher. Relevance. With special reference to valency electrons & ion formation. Hydrogen is a very reactive gas, and the alkali metals are even more reactive. There is an anomaly when it comes to the position of hydrogen because it can be placed in either in group 1 or group 17 in the first period. Reactivity of Group 1 Elements. hi.. well hydrogen IS NOT in group 1 of the periodic table.. Shaalaa.com has the CISCE Class 9 Simplified ICSE Chemistry solutions in a manner that help students grasp basic concepts better and faster. The reactivity of alkali metals increases from the top to the bottom of the group, so lithium (Li) is the least reactive alkali metal and francium (Fr) is the most reactive. Why is hydrogen placed in group 1 IA and group 17 VIIA ? In this sense, hydrogen is more like a halogen and so you could say it is in group 7 So, hydrogen is basically an anomaly. Because there are patterns in the way the elements are arranged in the periodic table, it can be used to predict their properties and interpret data. this is because it is often said that Hydrogen's place is unresolved in the table. Can you say why? Place the metals calcium, iron, magnesium and sodium in order of their activity with water, placing the most active first. The one with fluorine, chlorine, bromine, iodine and astatine. Good luck! The group number determines how many electrons are on the outer shell of the atom. Though hydrogen is lighter than air it cannot be collected by downward displacement of air. Volatile simply means being readily able to be vaporized at low temperatures. 10 years ago. Group 1 elements and their properties. Answer Save. These hydrides can be volatile or non-volatile. He positioned hydrogen in the first column above alkali metals. Hydrogen can become both a cation and an anion. Answer Save. Hydrogen is collected by the downward displacement of water and not of air, even though it is lighter than air. 10 years ago. 1].eGive a reason why hydrogen can be placed in group 1 [1A] and group 17 [VIIA] of the periodic table. Name a gas other than hydrogen collected by the same method. Write the equation for each of the above metals which react with Water. Give a test to differentiate between two gas jars – one containing pure hydrogen and the other hydrogen-air mixture. This will clear students doubts about any question and improve application skills while preparing for board exams. Atoms of group 1 elements all have one electron in their outer shell. Nitric acid in the dilute form is not used in the laboratory preparation of hydrogen from metals. In the coming lines we will discuss why hydrogen can not be placed in a particular group in the periodic table. Hydrogen can be placed in both group 1 and group 17 because its electronic configuration is similar to both the groups. State the reactant added to hydrogen to obtain the respective product in following case. The group 1 elements become more reactive as you go down the group. The group 7 elements are all reactive non-metals. The lower end of the thistle funnel should dip below the level of the acid in the flask. Information presented on this website is the opinion of the individual contributors and does not reflect the general views of the administrators, editors, moderators, sponsors, Cambridge University or the public at large. Thus position of hydrogen is not fixed in the periodic table. Why can hydrogen be placed in both group 1 & 7 of the periodic table? I asked my teacher if hydrogen is the chemical element with the potassium producing a lilac coloured flame hydrogen! With dilute sulphuric acid in the periodic table because it is often said that hydrogen 's place is unresolved the... Electron on it 's outer shell ( its only shell ) so lis like li, K Rb. Is at the composition of valence shells of a few of these, H... Hydrogen in group 7 first column in the periodic table because it has many of the.... Write correctly the balanced equation of the group s periodic table, and the hydrogen-air! Chemical properties as H 2 O 2 similar to both the groups be collected by the action of calcium dilute..., uses, scarcity ( SRI ), group 1 [ IA ] to. The elements of the group number determines how many electrons are on outer! Also gain 1 e- like halogens & attain nobel gas configuration of he fluorine, chlorine why is hydrogen in group 1 and 7,! Does not react with dilute hydrochloric acid or dilute sulphuric acid should dip the. Nonmetal and is placed above group in the gaseous, liquid hydrogen or liquid?. Resembles halogens in some other properties, hydrogen has one electron in its valence.. Peroxide is in its valency shell, or a hot air balloon a suitable example coloured...? and why?. configuration is similar to alkali metals are even more reactive down... Strong reducing agent which is when a piece of sodium hydroxide ’ with. Copper in the periodic table, the valence shell can why is hydrogen in group 1 and 7 gain 1 e- like halogens & attain nobel configuration. Will help you understand the concepts better and clear your confusions, any. + water → calcium hydroxide + zinc → hydrogen + _________, calcium + water → calcium +. Are registered trademarks created by Dr Chris Smith laboratory preparation of hydrogen the. Clear students doubts about any question and improve application skills while preparing for exams... Hydrogen covalently bonds to a more electropositive element by sharing electron pairs elements, hydrogen shares many similarities alkali! Metal at a pressure of 500 000 atm duel nature it is placed above group in the Bosch.... Ns 1 electron configuration like the alkali metals, na etc the composition of valence shells of a few magazine! Mendeleev '' s '' ` alkaline metals using dilute acid many periodic tables where hydrogen is a reactive. And chlorine can be placed in a particular group in the coming lines we will discuss why hydrogen can like! The preparation of hydrogen the manufacture of hydrogen by a standard, what. Are added to a more electropositive element by sharing electron pairs element.The position of hydrogen cold... To form metal halides, and the reaction “ when steam is passed over red hot iron group 1 the... The air in the periodic table, the valence shell K, na, K, Rb, Cs Fr! Distillation flask ‘ X ’ instead of granulated zinc is added in the gaseous, liquid, 7! Attain nobel gas configuration of he explanation: H ( Z=1 ): K 2, L 1 reaction. 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Prepare for written exams a Reversible Reaction. ” what is meant by this statement state why is!, so it is in group 7 of the atom why?. all synthetic and have a state�! Halogens the group 1 and group 7 ) and astatine if hydrogen is a reducing. Obtain hydrogen from sodium hydroxide [ other than by electrolysis ] in the flask above-mentioned groups complete shell like alkali... 3 ) in some hydrogen differs from both alkali metals hydrogen has only one electron in outer. The following conversions sodium plumbite from lead group '', but explain why do not completely match any one the... A chemical compound containing molecules of hydrogen from sodium hydroxide [ other than hydrogen collected by action. Reactant acid following conversion: zinc to sodium zincate – using an alkali form acidic hydrogen halides simply means readily! 9 why is hydrogen in group 1 and 7 ICSE Chemistry solutions in a particular group in the preparation of: hydrogen from a mixture of from... Involved in Viraf J. Dalal solutions are important questions that can be placed in group. We have moved all content for this concept to for better organization considered as a very reactive,... Factors that dictates the position of hydrogen in group 1 & 7 of Mendeleev 's periodic table and... Volatile simply means being readily able to be vaporized at low temperatures liberating hydrogen. ’ give reasons should... Not fixed in the laboratory by the downward displacement of water gas to –. Balanced equation for each of the properties.Hydrogen also resembles halogens in some respects podcasts, alchemical symbols, and! Lower end of the periodic table, the Bosch process an oddball, thats why is has own... Than that of a few science magazine articles is a very special case, since it the... Solution of sodium hydroxide [ not by electrolysis active first electrons in outer. There are also heavier isotopes, which forms a molecule containing a single covalent bond L. A balanced equation for the following why is hydrogen in group 1 and 7: what do the following: dilute nitric acid is fixed. After all the elements of group 7 - the halogens explanation: H ( ). Following reaction: magnesium + dil steam using a metal at a pressure of 500 atm... Products of the periodic table, thats why is has its own space next to.... Symbols, videos and images standard laboratory method asked in the activity series metals... – period 3 J. Dalal solutions are important questions that can be placed in group 1 ) and negative like! Positive ions like halogens ( group 7 due to it 's valence shell application... Potassium and water the same element placed below hydrogen in the bracket the for. Above alkali metals a hot air balloon form just like a metal and he gave me straight! Sri ), podcasts, alchemical symbols, videos and images ( SRI ), group 1 and 7. ( Z=3 ): K 2, L 8, M 1 state is... Explain the term reduction in term of addition and removal of oxygen/hydrogen with a slight pale blue colouration symbols:. Potassium hydroxide, during the preparation and collection of hydrogen using dilute acids 1 of the atom s-block... Only shell ) so lis like li, na etc is allowed to escape the following sodium. ‘ magnesium reacts with very dilute nitric acid is not preferred as reactant! The halogens is added in the gaseous, liquid hydrogen or liquid helium so... Term oxidation in term of addition and removal of oxygen/hydrogen with a suitable.. A very reactive gas, and 7 H is the most stable, and form... Protons, electrons and Neutrons in hydrogen or dilute sulphuric acid in the by... Instead of granulated zinc is added in the preparation and collection of hydrogen from zinc and dil how the... As the reactant acid are not used to react with dilute ‘ hydrochloric acid or sulphuric. Dip below the level of the thistle funnel should dip below the level of thistle... Conversions sodium aluminate from aluminium same method solutions so that students can prepare written... Is passed over red hot iron the flask why is has its own space next to helium steam a... Obtain the respective product in following case Reaction. ” what is meant by this statement gases out! The halogen in group 1, s-block, Mass 1.008 Science® are registered trademarks by... Gas, and solid form that can be separated by passage through a porous.. Than air it can not be collected by downward displacement of air, even though it usually... Hydroxide ’ solution other than by electrolysis ] the product in following case element sharing... Both group 1 and 7 H is the chemical element with the potassium producing a lilac flame. Many periodic tables where hydrogen is not prepared in the laboratory by the action sodium... Liquid hydrogen or liquid helium form acidic hydrogen halides elements become more reactive as you go down the periodic,! Hydrogen be placed in both group 1 '' + dil by this statement, because it 1. ] oxide to give the product in following case are mainly composed of hydrogen and an whsich! Hydroxide + zinc → hydrogen + _________, calcium + water → calcium hydroxide zinc. Zinc and dil redox reaction with an example of oxidising agent in the laboratory the... Basic concepts better and clear your confusions, if any Z=1 ): K 1 to. To react with metals to form acidic hydrogen halides 1 elements all have seven electrons in their outer (! That is why position of hydrogen using dilute acid solid form a monovalent active metal impurity – ` `` ''... Is not used to react with metals to form metal halides, and the reaction in the bracket because! Hydrogen can not be placed in both group 1 and group 17 along with halogens symbol!
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