SAQ : Define the term ‘isotope’. Express the two isotopes of hydrogen by the symbol.

Question

Define the term ‘isotope’. Express the two isotopes of hydrogen by the symbol.

Answer

Isotopes are atoms of the same element that have the same number of protons (atomic number) but a different number of neutrons (mass number). The two isotopes of hydrogen are represented by the symbols ₁H (protium) and ₂H (deuterium).