Question

elements belonging to the same group have the same valency Give reasons ​

Answer 1

Answer:

Solution : (1) The valency of an element is determined by the number of valence electron in the outermost shell of an atom of an element. (2) All the elements in a group have the same number of valence electrons. Therefore, elements in the same group should have the same valency.

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Answer 2

Answer:

1. they have same no of valency electron in the outer shells to reach octate rule
2. and they are arranged on basis of valency.....