Question

Explain how the valency of an element is related to its electronic configuration.
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class 9th ​

Answer 1

The valency of an tom refers to the number of electrons present in the outermost shell. the number of valence electrons in the atom will determine the last number of the atom's electron configuration.

For example , Sodium has an electron configuration of 2,8,1 , So it has 2 valence electrons.

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Answer 2

An element's valency is determined by the number of electrons in its outer shell. Hence, the number of valence electrons obtained from the electronic configuration of the element gives the valency i.e. the number of electrons lost, gained or shared by the element to attain the noble gas configuration.