Question

In which group of elements do most atoms have completely filled s and p valence sublevels?

Answer 1

Group 8A or Noble Gases

Answer 2

Noble or inert gases belong to the group 8A and have completely filled stable, outermost shells. The outermost electronic configuration of the noble gases can be represented as,

1. Helium - $1s^{2}$

2. Neon - $[He]2s^{2}2p^{6}$

3. Argon - $[Ne]3s^{2}3p^{6}$

4. Krypton - $[Ar] 3d^{10}4s^{2}4p^{6}$

5. Xenon - $[Kr] 5d^{10}6s^{2}6p^{6}$

6. Radon - $[Xe] 4f^{14} 5d^{10}6s^{2}6p^{6}$

So, the correct answer will be noble gases.