GENERAL KNOWLEDGE

Detailed explanation-1: -Atomic number is the number of protons present in the nucleus of an atom of an element. Example: The nucleus of hydrogen atom contains 1 proton and hence, the atomic number of hydrogen is 1. The nucleus of carbon atom has 6 protons and hence, the atomic number of carbon is 6.

Detailed explanation-2: -The total number of protons and neutrons in the nucleus of an atom is called its mass number.

Detailed explanation-3: -The number of protons in an atom is called the ATOMIC NUMBER of the element. Each element therefore has a unique atomic number.