Question

What is the quantization of charge? What is its physical significance?

Answer 1

Answer:

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.

Answer 2

Answer:

It means total charge acquired by a body is an internal multiple of magnitude of charge on a single electron.

That is of

$1.67 \times { 10}^{ - 19}$