When an atom does not gain or lose or share electrons in its outermost shell its valency becomes zero. The atom has its outermost shell completely filled and thus, it does not gain or lose or share electrons. Such atoms having valency zero are known as zerovalent.
1)Valency is the combining power of an element. Elements in the same group of the periodic table have the same valency. The valency of an element is related to how many electrons are in the outer shell
2)In hydrogen atom, the outer most orbit has one electron. Therefore, it has the capability of combining with electron of any other element. Hence its valency is 1.
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When an atom does not gain or lose or share electrons in its outermost shell its valency becomes zero. The atom has its outermost shell completely filled and thus, it does not gain or lose or share electrons. Such atoms having valency zero are known as zerovalent.
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But valency of hydrogen is 1...
1)Valency is the combining power of an element. Elements in the same group of the periodic table have the same valency. The valency of an element is related to how many electrons are in the outer shell
2)In hydrogen atom, the outer most orbit has one electron. Therefore, it has the capability of combining with electron of any other element. Hence its valency is 1.
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