Hydrogen has three isotopes: protium (\( {}^{1}\mathrm{H} \)), deuterium (\( {}^{2}\mathrm{H} \)) or \( \mathrm{D} \) and tritium (\( {}^{3}\mathrm{H} \) or \( \mathrm{T} \)). They have nearly same chemical properties but different physical properties. They differ in
