d. Elements belonging to the same group have the same valency.

Question

7. Write scientific reasons
d. Elements belonging to the same group have the same valency.

Answer 1

i. The electronic configuration of the outermost shell is same for all the elements belonging to the same group.
ii. So, the number of valence electrons for all the elements in a group is the same.
iii. The valency of an element is determined by the valence electrons.
Hence, elements belonging to the same group have the same valency.