-1 state of halogens is common and stable but -1 of Hydrogen is rare and extremely reactive. However, in group 1, hydrogen shares properties with the alkaline metals. Share 0. Li (Z=3): K 2, L 1 Entertainment News - Find latest Entertainment News and Celebrity Gossips today from the most popular industry Bollywood and Hollywood. Like group I elements, hydrogen has only one electron in its valence shell. 10 years ago. 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. Review. 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. Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. Hydrogen can be placed in group 1 and group 7 of mendeleev's periodic table why - Science - Periodic Classification of Elements Give the general group characteristic applied to hydrogen with respect to similarity in properties of hydrogen with alkali metals of group 1 [IA]. Example. Explain why group 1 elements often form compounds with elements in group 17. Thus it can lose an electron to achieve a stable configuration like alkali metals and hence can be placed in group 1 … shell. The Group 7 elements are known as the halogens. This characteristic of hydrogen matches those of alkali metals. Give a reason why hydrogen can be placed in group 1 [1A] and group 17 [VIIA] of the periodic table. This means that the alkali metals all have similar chemical properties. Share with your friends. The Group 7 elements are known as the halogens. They are reactive non-metals and are always found in compounds with other elements. In the coming lines we will discuss why hydrogen can not be placed in a particular group in the periodic table. Hydrogen also resembles halogens in many ways. Answer Save. 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. 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. Like group I elements, hydrogen has only one electron in its valence shell. group 7 element) or give one away (like a group 1 element). elements in group I-A. Like group I elements, hydrogen has only one electron in its valence shell. They react with metals to form metal halides, and with hydrogen to form acidic hydrogen halides. Why are bacteria well suited to produce useful substances as a result of biotechnology? Ask your question. Similarities to 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. Give reason why hydrogen can be placed in group 1 (1a) and group 17 (7a) 2 See answers sahebrambani is waiting for your help. The wrong placing of the element Hydrogen in the periodic table. Chlorine, bromine and iodine are all halogens. Hence, it can also be placed above the halogen group. When did organ music become associated with baseball? 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 can be placed in both group 1 and group 17 because its electronic configuration is similar to both the groups. Favorite Answer. Group 7 - the halogens The group 7 elements are all reactive non-metals. Hydrogen has a single valence electron, thus it can lose e- & become a +vely charged cation like alkali metals & thus attain noble gas state. 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. Hydrogen can be in both group 1 and group 7 due to it's valence shell. Add your answer and earn points. Anonymous. Many gases can be liquefied by cooling, producing liquids such as liquid oxygen, liquid nitrogen, liquid hydrogen and liquid helium. But some, like the one I was given, also show Hydrogen in the 7th group, to left of Helium. Why don't libraries smell like bookstores? How long will the footprints on the moon last? Hydrogen is considered to be in a group of its own. Thus position of hydrogen is not fixed in the periodic table. Resemblance Of Hydrogen With Alkali Metals(Group I-A) 1) Like alkali metals hydrogen has one electron in its valency shell. 2.2 Answer any five questions 1. Why? 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. It forms covalent compounds like halogens unlike alkali metals. Reuters.com brings you the latest news from around the world, covering breaking news in markets, business, politics, entertainment, technology, video and pictures. Why hydrogen can be in group 1 and also can be in group 7? Atoms of group 7 elements all have seven electrons in their outer shell. nikhilnigam266 nikhilnigam266 Answer: Tap on a clip to paste it in the text box. That is why position of hydrogen is still undecided. What date do new members of congress take office? Therfore it is placed in Group 1. It can get rid of one electron to attain noble gas configuration. The group 7 elements are all reactive non-metals. 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. Performance & security by Cloudflare, Please complete the security check to access. These s-block elements are found in Group 1 and Group 2 of the periodic table and are the most active metals. 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. Why can hydrogen be placed in both group 1 & 7 of the periodic table? Your IP: 217.182.169.93 Na (Z=11): K 2, L 8, M 1 resempblence with halogens (Group -17 or Group VII)--- (1)electronic configuration:-all halogens have 7 electrons in their repective outermost shell … Join now. in column 1. it only needs one electron ot complete shell like the halogen in group 7. VIEW SOLUTION. Also, as its atomic number is 1,it is first in the periodic table. 1 0. All Rights Reserved. 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. Because it has 1 electron, it can either accept one (like a Answer Save. THESE PROPERTIES LEAD TO THE UNEXPLAINED POSITION OF HYDROGEN Hydrogen conducts electricity in liquid form just like a metal does. 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. Hydrogen can be placed in group 1 and group 7 of mendeleev's periodic table. Another way to prevent getting this page in the future is to use Privacy Pass. Hydrogen can be placed in group 1 and group 7 of periodic table. What is the kannada word for quinova seeds? Hydrogen can be placed in group 1 and group 7 of periodic table Why - Chemistry - TopperLearning.com | 5pvnskvnn 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. Relevance. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply. What is the WPS button on a wireless router? In the coming lines we will discuss why hydrogen can not be placed in a particular group in the 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. 1 Answer. The modern periodic table does not show hydrogen in Group 1. Not all gases can be liquified at atmospheric pressure, however. Name two elements whose properties were correctly predicted by Mend What was lasik visons competitive priority? Hydrogen shares many similarities with alkali metals, i.e. • Astatine should react very slowly with hydrogen, even when heated. Relevance. But it can also gain 1 e- like halogens & attain nobel gas configuration of He. Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass. 7Th group, to left of helium alchemical symbols, videos and images forms similar diatomic as... Pressure, however ) like alkali metals hydrogen has only one electron in valence! Result of biotechnology is the distrbution of water in the periodic table only be liquified at above. Varies greatly from the alkali metals ( group 1 of the periodic table,,. 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