Question

The atomic number of an element 'X' is 11.

1. Write the electronic configuration of X and find its valency.
2. Write the formula and nature of its oxide.

Answer 1

(i) The electronic configuration of element X is : 2, 8, 1

Valency = 1

(ii) The formula of the oxide 'X' is X₂O. It is because the valency of element 'X' is 1 and valency of oxygen is 2.

X₂O is a basic oxide. Since, element X contains one electron in its valence shell, so it is a metal and metal forms basic oxides.