Question

An element belongs to Group 17 and the third period of the periodic table. Write the following:

Its metallic and non-metallic nature.

Answer 1

Metallic or non-metallic:

1. Metallic and non-metallic character decreases because effective nuclear charge increases along the period and increases due to an increase in the number of shells down the group.
2. The element that belongs to group 17 and period 3 is Chlorine $\left(\mathrm{Cl}\right)$ and has 3 shells.
3. The electronic configuration of chlorine is $\mathrm{Cl}\to 2,8,7$.
4. The element Chlorine is non-metallic in nature.