আইসোটোনের উদাহরণ-

${ }_{7}^{13} \mathrm{N},{ }_{6}^{13} \mathrm{C}$

${ }_{18}^{40} \mathrm{Ar},{ }_{20}^{40} \mathrm{Ca}$

${ }_{20}^{40} \mathrm{Ca},{ }_{19}^{40} \mathrm{K}$

${ }_{15}^{31} \mathrm{P},{ }_{16}^{32} \mathrm{S}$