Atomic Number [AN]
[AN] of an element [=material made all of one and the same atoms like oxygen, hydrogen etc. Water is a compound made of 2 elements Hydrogen and Oxygen] is the number of protons in one of its atoms.
An atom carries 3 different electric charge particles: –
1- Positive charges called protons,
2 Negative charges called electrons and
3- Neutral particles called neutrons.