Isotopes are atoms of the same element having different atomic masses.
- All atoms of the same element possess identical number of protons. However, they may have different number of neutrons.
- This phenomenon is termed as isotopy and the atoms of the same element having the same number of protons but different number of neutrons are termed as isotopes.
- The isotopes of the same element have the same chemical properties due to possession of identical number of electrons.
- Hydrogen possess three isotopes which are; Protium, Deuterium and tritium.