How dose valency vary in a period and in a group??
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valency vary in a group as the number of electrons in valence shell or outermost shell vary
jitendra74:
its not answer that i am expecting
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in groups the valency will remain same for example in 1A group : the valency of elements is 1
BUT
in period the elements do not follow any order for example in 1st period the elements hydrogen Nd helium have different valancies.
:-)
hope it helps u
BUT
in period the elements do not follow any order for example in 1st period the elements hydrogen Nd helium have different valancies.
:-)
hope it helps u
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