Question

Explain the statement - "Charge is QUANTIZED".

Answer 1

Charge quantization, then, means that charge cannot take any arbitrary values, but only values that are integral multiples of the fundamental charge(charge of proton/electron). For example, in a hydrogen ion, we usually denote it with a positive sign to indicate that there's one proton more than there are electrons.

PRACTICAL MEANING
Charge of an electron is 1.602 x 10^ -19 C
You can have charge only in multiples of 1.602 x 10 ^ -19 C because there is no such thing as ½ or ⅓ or ¼ electron.Only full electron exists.
That means charge can be,
1.602 x 10^-19 C
3.204 x 10^-19 C
4.806 x 10^-19 C
...........................
...........................
n x 1.602 x 10^-19 C

This is why we tell charge is quantized