Resemblance Of Hydrogen With Alkali Metals(Group I-A) 1) Like alkali metals hydrogen has one electron in its valency shell. Why hydrogen can be in group 1 and also can be in group 7? Add your answer and earn points. Ionic hydrides form when hydrogen reacts with s-block metals, not including Be and Mg. Hydrogen can be in both group 1 and group 7 due to it's valence Therfore it is placed in Group 1. This is a gas at room temperature, for example. It can get rid of one electron to attain noble gas configuration. Please enable Cookies and reload the page. Share 0. Hydrogen has a single valence electron, thus it can lose e- & become a +vely charged cation like alkali metals & thus attain noble gas state. hi.. well hydrogen IS NOT in group 1 of the periodic table.. 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. Like halogens, hydrogen is a gas, and exists as a diatomic molecule (H2). Hydrogen forms both positive ions like alkali metals (group 1) and negative ions like halogens (group 7). Favorite Answer. But it can also gain 1 e- like halogens & attain nobel gas configuration of He. • Entertainment News - Find latest Entertainment News and Celebrity Gossips today from the most popular industry Bollywood and Hollywood. Hydrogen can be placed in group 1 and group 7 of mendeleev's periodic table. In Mendeleev"s Periodic table, the position of hydrogen was not clear. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply. 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. All Rights Reserved. But some, like the one I was given, also show Hydrogen in the 7th group, to left of Helium. Hydrogen can be in both group 1 and group 7 due to it's valence shell. Answer Save. 1. You may need to download version 2.0 now from the Chrome Web Store. Not all gases can be liquified at atmospheric pressure, however. 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. shamoon62 shamoon62 11.03.2019 Chemistry Secondary School In others, you might find hydrogen placed independently of any group; somewhere at the top of the Periodic Table. Use the information to predict the reaction of astatine with hydrogen. this is because it is often said that Hydrogen's place is unresolved in the table. Why? Thus it can lose an electron to achieve a stable configuration like alkali metals and hence can be placed in group 1 … Name two elements whose properties were correctly predicted by Mend Explanation : H (Z=1): K 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. 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. Thus, it can be placed in both group 1 and group 7. The wrong placing of the element Hydrogen in the periodic table. 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. Another way to prevent getting this page in the future is to use Privacy Pass. 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. 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. Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. 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). Thus, it can join fluorine, chlorine, bromine, and iodine by losing its electron, or it can become a cation joining sodium, lithium, etc. Hydrogen conducts electricity in liquid form just like a metal does. In the coming lines we will discuss why hydrogen can not be placed in a particular group in the periodic table. Relevance. Why can hydrogen be placed in both group 1 & 7 of the periodic table? Example. 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 only has one electron in outer shell (its only shell) so lis like Li, Na etc. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images. What does contingent mean in real estate? 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. Group 7 - the halogens The group 7 elements are all reactive non-metals. Unique position of Hydrogen in periodic table. Why? 1 Answer. VIEW SOLUTION. ( 2 ) It readily looses its electron to form H + ion which resembles the electropositive character of group I elements. 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. This means that the halogens all have similar chemical reactions. From the top to the bottom of group 1, the elements have heavier, more reactive atoms. 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. Pressure, however Tables, you might find hydrogen placed above group in the Universe, constituting roughly 75 of... That is why position of hydrogen matches those of alkali metals classified as a diatomic (. Ip: 217.182.169.93 • Performance & security by cloudflare, please complete the check... Actually, in group 1 elements often form compounds with elements in group 7 to. 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