Question

what is valency and valence shell

Answer 1

hey frnd here's ur answer

valency -the combining power of an element is called valency.

valence shell -This outermost shell is known as the valence shell, and the electrons found in it are called valence electrons.

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Answer 2

here is your answer:-

the combining capacity of any element is called valency
the outermost shell in which electron is present is known as valance shell.
for example-
electronic configuration of Al is
K,L,M
2,8,3
here its valency is +3 and M is the valance shell.

hope it helped ^_^