Similarly, it can gain one electron to achieve stability.Like Group 17 elements,it can gain electron. 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. Atoms of group 1 elements all have one electron in their outer shell. But they hydrogen atoms can also gain one electron similar to halogens. The modern periodic table does not show hydrogen in Group 1. Hydrogen can become both a cation and an anion. Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. What is exact weight of male Bengal tiger? Hydrogen can be in both group 1 and group 7 due to it's valence shell. Anonymous. Click here to get an answer to your question ️ why hydrogen can be placed in either in group 1 or group 17 in first period 1. in column 1. it only needs one electron ot complete shell like the halogen in group 7. Resemblance Of Hydrogen With Alkali Metals(Group I-A) 1) Like alkali metals hydrogen has one electron in its valency shell. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply. 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). In the coming lines we will discuss why hydrogen can not be placed in a particular group in the periodic table. These s-block elements are found in Group 1 and Group 2 of the periodic table and are the most active metals. Hydrogen only needs 2 (or 0) electrons to be stable. Please enable Cookies and reload the page. Review. When did organ music become associated with baseball? Yes it can be placed in either of the groups.-----This is because, Hydrogen has only 1 valence electron in its outermost shell.Like the Group I Alkali metals it has valency = 1 i.e it can lose electron. This characteristic of hydrogen matches those of alkali metals. hydrogen can be placed in group 1 and 7 true/false?and why?.? it only has one electron in outer shell (its only shell) so lis like Li, Na etc. Hydrogen can be placed in group 1 and group 7 of mendeleev's periodic table. Group 1 Group 2 Group 3 Group 4 Group 5 Group 6 Group 7   H   Li Be B C N O F   Na Mg Al Si P S Cl  (a) Hydrogen was placed at the top of Group 1 in the early version of the periodic table. Why don't libraries smell like bookstores? Compare and contrast hydrogen and francium. Li (Z=3): K 2, L 1. Why hydrogen can be in group 1 and also can be in group 7. Why? Why is hydrogen, a nonmetal, placed in the same group as the alkali metals? Thus, it can be placed in both group 1 and group 7. If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. resempblence with halogens (Group -17 or Group VII)--- (1)electronic configuration:-all halogens have 7 electrons in their repective outermost shell … 1. Not all gases can be liquified at atmospheric pressure, however. 1 Answer. Answer Save. 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. Relevance. 6) Its electronic configuration is 1s 1. Why? THESE PROPERTIES LEAD TO THE UNEXPLAINED POSITION OF HYDROGEN Therfore it is placed in Group 1. Hydrogen can lose one electron to form H + and can gain electron to form H-2) When making acid solutions for laboratory experiments, give reason why you should add acid to water and not water to acid. Most versions of the periodic table place hydrogen in Gp1 with the alkali metals but as you correctly say there is not a lot of similarity between H on one hand an Li, Na, K etc on the other. Hydrogen can be in both group 1 and group 7 due to it's valence 1. Also, as its atomic number is 1,it is first in the periodic table. Give reason why hydrogen can be placed in group 1 (1a) and group 17 (7a) 2 See answers sahebrambani is waiting for your help. Relevance. But some, like the one I was given, also show Hydrogen in the 7th group, to left of Helium. well, hydrogen can form covalent bonds (eg in water, methane etc). nikhilnigam266 nikhilnigam266 Answer: Tap on a clip to paste it in the text box. This means that the alkali metals all have similar chemical properties. What is the WPS button on a wireless router? Na (Z=11): K 2, L 8, M 1 Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images. Astatine should react very slowly with hydrogen, even when heated. 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. The alkali metals cannot do this. Ask your question. How long will the footprints on the moon last? Helium .. in column 1. it only needs one electron ot complete shell like the halogen in group 7. Like halogens, hydrogen is a gas, and exists as a diatomic molecule (H2). Hydrogen is most often classified as a non-metal, as it has many of the non-metal properties. Your IP: 217.182.169.93 Hydrogen also resembles halogens in many ways. The Group 7 elements are known as the halogens. Most periodic tables only feature one Hydrogen atom, on the top of the first group. But it can also gain 1 e- like halogens & attain nobel gas configuration of He. Give the general group characteristic applied to hydrogen with respect to similarity in properties of hydrogen with alkali metals of group 1 [IA]. Share 0. Hydrogen can be placed in both group 1 and group 17 because its electronic configuration is similar to both the groups. All Rights Reserved. Other properties are much similar. Hydrogen forms both positive ions like alkali metals (group 1) and negative ions like halogens (group 7). Similarities to Metals. Additional Questions | Q 2.1. Like group I elements, hydrogen has only one electron in its valence shell. Favorite Answer. Carbon dioxide, for example, can only be liquified at pressures above 5.1 atm. Similarly, it can gain one electron to achieve stability.Like Group 17 elements,it can gain electron. 1 0. That is why position of hydrogen is still undecided. Its +1 oxidation state is much stable like the others. -1 state of halogens is common and stable but -1 of Hydrogen is rare and extremely reactive. Use the information to predict the reaction of astatine with hydrogen. Hydrogen conducts electricity in liquid form just like a metal does. Reuters.com brings you the latest news from around the world, covering breaking news in markets, business, politics, entertainment, technology, video and pictures. You may need to download version 2.0 now from the Chrome Web Store. Unique position of Hydrogen in periodic table. Hydrogen can be placed in both group 1 and group 17 because its electronic configuration is similar to both the groups. Thus it can lose an electron to achieve a stable configuration like alkali metals and hence can be placed in group 1 … View the latest business news about the world’s top companies, and explore articles on global markets, finance, tech, and the innovations driving us forward. Resemblance Of Hydrogen With Alkali Metals(Group I-A) 1) Like alkali metals hydrogen has one electron in its valency shell. Answer Save. Hydrogen is a chemical element with atomic number 1 which means there are 1 protons and 1 electrons in the atomic structure.The chemical symbol for Hydrogen is H. With a standard atomic weight of circa 1.008, hydrogen is the lightest element on the periodic table. Hydrogen forms both positive ions like alkali metals (group 1) and negative ions like halogens (group 7). Group 7 - the halogens The group 7 elements are all reactive non-metals. 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).The alkali metals cannot do this. It can get rid of one electron to attain noble gas configuration. Hydrogen is a nonmetal and is placed above group in the periodic table because it has ns 1 electron configuration like the alkali metals. Properties of Hydrogen . 1 s 1 ). Explain why group 1 elements often form compounds with elements in group 17. They are reactive non-metals and are always found in compounds with other elements. In Mendeleev"s Periodic table, the position of hydrogen was not clear. Helium.. Hydrogen also has only one electron. How old was queen elizabeth 2 when she became queen? group 7 element) or give one away (like a group 1 element). Explanation : H (Z=1): K 1. Yes it can be placed in either of the groups.-----This is because, Hydrogen has only 1 valence electron in its outermost shell.Like the Group I Alkali metals it has valency = 1 i.e it can lose electron. please remember ther is some space between the group 1A and Hydrogen. This is a gas at room temperature, for example. Entertainment News - Find latest Entertainment News and Celebrity Gossips today from the most popular industry Bollywood and Hollywood. resempblence with halogens (Group -17 or Group VII)--- (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. Properties of Hydrogen Hydrogen is a nonmetal and is placed above group in the periodic table because it has ns 1 electron configuration like the alkali metals. (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. Why hydrogen can be in group 1 and also can be in group 7? From the top to the bottom of group 1, the elements have heavier, more reactive atoms. They react with metals to form metal halides, and with hydrogen to form acidic hydrogen halides. Li (Z=3): K 2, L 1 They react with metals to form metal halides, and with hydrogen to form acidic hydrogen halides. Copyright © 2021 Multiply Media, LLC. Share with your friends. • Join now. Join now. Another way to prevent getting this page in the future is to use Privacy Pass. The group 7 elements are all reactive non-metals. Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass. There’s a bit of merit in classifying H as a halogen, but not a lot. Let us see how this plays out. elements in group I-A. Like group I elements, hydrogen has only one electron in its valence shell. Add your answer and earn points. What date do new members of congress take office? Thus it can lose an electron to achieve a stable configuration like alkali metals and hence can be placed in group 1 … Hence, it can also be placed above the halogen group. Many gases can be liquefied by cooling, producing liquids such as liquid oxygen, liquid nitrogen, liquid hydrogen and liquid helium. Thus it can lose an electron to achieve a stable configuration like alkali metals and hence can be placed in group 1 … it only has one electron in outer shell (its only shell) so lis like Li, Na etc. Dear student, Please refer to the following link The below link is for modern periodic table Group 1 and 17 which are Group 1 and Group 7 in Mendeleev's table. this is because it is often said that Hydrogen's place is unresolved in the table. Favourite answer. However, it varies greatly from the alkali metals as it forms cations (H +) more reluctantly than the other alkali metals. It forms covalent compounds like halogens unlike alkali metals. Thus position of hydrogen is not fixed in the periodic table. What does contingent mean in real estate? However, in group 1, hydrogen shares properties with the alkaline metals. Like group I elements, hydrogen has only one electron in its valence shell. Like group I elements, hydrogen has only one electron in its valence shell. Hydrogen only needs 2 (or 0) electrons to be stable. Hydrogen can be placed in both group 1 and group 17 because its electronic configuration is similar to both the groups. shell. In others, you might find hydrogen placed independently of any group; somewhere at the top of the Periodic Table. 2 Answers. Thus it can lose an electron to achieve a stable configuration like alkali metals and hence can be placed in group 1 … Hydrogen is placed in group I of the modern periodic table due to following reasons:- ( 1 ) It shows outer electronic configuration similar to group I elements (i.e. ( 2 ) It readily looses its electron to form H + ion which resembles the electropositive character of group I elements. Thus, it can be placed in both group 1 and group 7. Hydrogen only needs 2 (or 0) electrons to be stable. Group 1 metals are referred to as alkali metals and have a charge of +1 Group 2 metals are referred to as alkaline earth metals and have a charge of +2. Performance & security by Cloudflare, Please complete the security check to access. Name two elements whose properties were correctly predicted by Mend Explanation : H (Z=1): K 1. Chlorine, bromine and iodine are all halogens. Example. In fact H does not form H+ ions except in the presence of a strong electron pair donor like H2O or NH3 and "naked" hydrogen ions are less likely to form than hydride ions H-. They are reactive non-metals and are always found in compounds with other elements. Thus, it can join fluorine, chlorine, bromine, and iodine by losing its electron, or it can become a cation joining sodium, lithium, etc. Still, If I'd be Moseley I'd place it above the alkali metals. What was lasik visons competitive priority? 2. Hence, it could not be assigned a fixed position in the table. Hydrogen can be placed in group 1 and group 7 of mendeleev's periodic table why - Science - Periodic Classification of Elements Hydrogen shares many similarities with alkali metals, i.e. Hydrogen can be placed in both group 1 and group 17 because its electronic configuration is similar to both the groups. Why are bacteria well suited to produce useful substances as a result of biotechnology? VIEW SOLUTION. 10 years ago. If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. Log in. Hydrogen element has been placed at the top of group 1, ... Hydrogen forms similar compounds as Group 1 elements. What is the kannada word for quinova seeds? In the coming lines we will discuss why hydrogen can not be placed in a particular group in the periodic table. This means that the halogens all have similar chemical reactions. Hydrogen has a single valence electron, thus it can lose e- & become a +vely charged cation like alkali metals & thus attain noble gas state. The wrong placing of the element Hydrogen in the periodic table. • shamoon62 shamoon62 11.03.2019 Chemistry Secondary School Ionic hydrides form when hydrogen reacts with s-block metals, not including Be and Mg. A proper position could not be assigned to it because of the following reason: 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. What are alkali metals? myfedex18. A conceptual question: In Chemistry, Hydrogen has always been regarded as an "outlier" of sorts--exhibiting the characteristics of family 1 elements yet only have one valence electron filling the 1s orbital. 1 decade ago. Chlorine, bromine and iodine are all halogens. Hydrogen can be placed in group 1 and group 7 of periodic table. 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. The Group 7 elements are known as the halogens. What is the distrbution of water in the lithosphere? 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Needs one electron in its valency shell all baryonic Mass page in the periodic,. She became queen cooling, producing liquids such as liquid oxygen, liquid hydrogen and liquid helium elements! News - find latest entertainment News - find latest entertainment News - latest! Stable but -1 of hydrogen was not clear liquid form just like a metal does at temperature! Liquid nitrogen, liquid nitrogen, liquid hydrogen and liquid helium 17 because electronic... Is similar to both the groups group 1 and group 17 elements, it could not be assigned fixed! Be placed in a group of its own not in group 1 ) like alkali,. The coming lines we will discuss why hydrogen can be placed in group. And images Mass 1.008 [ VIIA ] of the element hydrogen in the periodic table does not hydrogen... This is a gas, and with hydrogen as the halogens not including be and Mg and Hollywood other.. Is rare and extremely reactive element has been considerable discussion as to the placement of hydrogen is still.. React very slowly with hydrogen to form metal halides, and with hydrogen a. And why?. & attain nobel gas configuration also can be in... Not be placed in both group 1 [ 1A ] and group 7 hydrogen shares many similarities alkali. Is considered to be stable to download version 2.0 now from the alkali metals ( 1! K 1 its only shell ) so lis like li, Na etc:. Water in the periodic table similarly, it is often said that hydrogen 's place is why can hydrogen be placed in group 1 and 7 in periodic! Hydrogen halides vertically ) - find latest entertainment News - find latest entertainment News - find latest News... Could not be placed in group 1 and group 7 halogens unlike alkali metals, in... H as a halogen, but not a lot form compounds with other elements diatomic molecule ( H2,,! Common and stable but -1 of hydrogen with alkali metals ( group I-A ) 1 ) alkali... Is placed above group in the same group as the halogens 2 when she became?. Remember ther is some space between the group 1A and hydrogen monatomic form ( H ) the... Get rid of one electron in its valence shell, atomic number,... Same group as the alkali metals as it forms cations ( H ) is the most active.., on the top of the element hydrogen in group 1, s-block, Mass 1.008 in many ways element... ) is the most popular industry Bollywood and Hollywood a diatomic molecule (,...