Question

elements of group one element of group 17 both have valency 1 explain​

Answer 1

Hey friend your answer

yes, both have valency one as the group 1st element contains 1 valance electron which they can donate other easily hence its valency is 1 while group 17 elements contain 7 valence electrons by which they can accept 11 electron easily to become stable hence its valency is 1.

Hope it helps you!❤

Answer 2

Because the element of group 1 have 1 electron in valence shell so they can donate 1electron whereas in group 17 elements have 7 electrons in valence shell so they can accept 1electron

Valency is the combining capacity of an element

Elements of group 1 and group 16 both have valency 1