Definition of Avogadro’s Number

Avogadro’s number states that the number of particles present in one mole of a substance is 6.022 * 10²³. The particles here are referred to as the electrons, ions, atoms, and molecules. The usage of these particles depends upon the type of the substance and the nature of the reaction undergone by them.

The Avogadro’s number is represented as N_A and its unit is the mole. It is a dimensionless quantity and the Avogadro’s number was made a constant as the mass of 1 mole of a substance is equal to the average mass of 1 molecule of the compound.