Define isotope and give two examples.

Explanation

Isotope : The atoms of the same element which have the same number of protons but have different number of neutrons are called isotopes.
Ex. 1. Isotopes of hydrogen are
`underset("(Hydrogen)")(._(1)^(1)H)" "underset("(Deuterium)")(._(1)^(2)H)" "underset("(Tritium)")(._(1)^(3)H)`
2. Isotopes of carbon are
`underset("(Carbon - 12)")(._(6)^(12)C)" "underset("(Carbon - 13)")(._(16)^(13)C)" "underset("(Carbon - 14)")(._(6)^(14)C)`