Question

The number of atoms present in a molecule of a substance is called its:

• A. molecularity
• B. atomicity
• C. valency
• D. reactivity

Answer 1

The correct option is B atomicity

The number of atoms present in a molecule of a substance is called its atomicity. Example - Atomicity of helium $\left(He\right)$ is one it is monoatomic, atomicity of oxygen molecule $\left(O_2\right)$ is two it is diatomic and atomicity of glucose $\left(C_6{H}_{12}{O}_6\right)$ is 24 it is polyatomic.