GENERAL KNOWLEDGE

Detailed explanation-1: -Isotopes are atoms with different atomic masses which have the same atomic number. The atoms of different isotopes are atoms of the same chemical element; they differ in the number of neutrons in the nucleus.

Detailed explanation-2: -Isotopes of an element are atoms with the same number of protons, but a different number of neutrons. Changing the number of neutrons in an atom changes that atom’s atomic mass.

Detailed explanation-3: -The number of neutrons can be different, even in atoms of the same element. Atoms of the same element that contain the same number of protons, but different numbers of neutrons, are known as isotopes.