Question

The atomicity of O is 2.

• A. It has one electron in its valance shell.
• B. It has one atom each in their molecules

Answer 1

The correct option is A

It has one electron in its valance shell.

Atomicity of an element is defined as the number of atoms present in one molecule of an element. In nature, an oxygen molecule, $O_2$, contains 2 atoms of oxygen. In other words, oxygen is diatomic in nature.