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hydrogen is an electropositive element. But 2 H atoms link together by covalency to form H molecule. in the formation both atoms attain their duplet by gaining an electron. but since H is electropositive placed in group 1A of the Periodic table it should not gain electron but, why it does so?

2006-10-05 16:03:26 · 4 answers · asked by rohit_gupta322 2 in Science & Mathematics Chemistry

4 answers

Since the first electron shell of an atom only holds 2 electrons, gaining an electron enables the hydrogen atom to have a full electron shell, which is the driving force for all chemical bonds. Therefore, when two hydrogen atoms combine to form H2, they each share their electrons, and both of them will then have a full electron shell. Liberating an electron is more difficult in non-metals than simply sharing one, and is in fact nearly impossible between two atoms with similar electronegativity (such as two atoms of the same element), therefore, this configuration is the only option between two hydrogen atoms.

2006-10-05 16:10:14 · answer #1 · answered by nomae_pl 2 · 0 0

Rohit the structure of a stable molecule requires that the element should have 2 or 8 electrons in its outer most shell. That is the reason that hydrogen forms a covalent bond.

2006-10-05 21:11:07 · answer #2 · answered by Anonymous · 0 0

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2016-12-04 07:59:11 · answer #3 · answered by bednarz 4 · 0 0

it gains electrons because it wants to complete duet, which is lacking an electron which is negative, so it balances the positive.

right? sorry im not sure

2006-10-05 16:07:21 · answer #4 · answered by jinternazionale 2 · 0 0

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