Question

23. Define the term isotope with a suitable example.

Answer 1

1. Isotopes are be defined as the atoms of the same element which have same atomic number but different mass number.
2. For example- Hydrogen, Deuterium and Tritium. All the isotopes have only one proton but different neutrons.
3. Hydrogen or protonium (${\mathrm{H}}_1^1$) has no neutrons.
4. Deuterium (${\mathrm{H}}_1^2$) has one neutron.
5. Tritium (${\mathrm{H}}_1^3$) has two neutrons.