Question

What approximate term will you use for three different atom of hydrogen represented by ${}_1{}^{}\mathrm{H}^1,{}_1{}^{}\mathrm{H}^2,{}_1{}^{}\mathrm{H}^3.$

Answer 1

Three different atoms of hydrogen are represented by ${}_1{}^{}\mathrm{H}^1,{}_1{}^{}\mathrm{H}^2,{}_1{}^{}\mathrm{H}^3.$

These atoms have the same atomic number but different atomic mass.

So they are termed isotopes.

ISOTOPES

• The isotopes of an element have the same atomic number but different atomic masses.
• The difference in their masses is due to the presence of the different numbers of neutrons.