Question

Identify the valency electrons present in the following elements by using electronic configuration oxygen, sodium shulphur chlorine Calicum

Answer 1

(A)
Oxygen (O): The electronic configuration of oxygen is 1s^2 2s^2 2p^4. Oxygen has 6 valence electrons.

(B)

Sodium (Na): The electronic configuration of sodium is 1s^2 2s^2 2p^6 3s^1. Sodium has 1 valence electron.

(C)

Sulfur (S): The electronic configuration of sulfur is 1s^2 2s^2 2p^6 3s^2 3p^4. Sulfur has 6 valence electrons.

(D)

Chlorine (Cl): The electronic configuration of chlorine is 1s^2 2s^2 2p^6 3s^2 3p^5. Chlorine has 7 valence electrons.

(E)
Calcium (Ca): The electronic configuration of calcium is 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2. Calcium has 2 valence electrons.

Hope this helps!