Question

5). what are the valance electrons ? For s-block
and pl p-block elements show that number
of Valence electrons is equal to its group
number in tebal​

Answer 1

Since it has one valence electron, it is placed in group 1. Therefore, for s-block elements, group number = number of valence electrons. However, for p-block elements, group number = 18 – number of electrons required to attain complete octet. N is a p-block element and its electronic configuration is 1s2 2s2 2p3.

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