How many isotopes of Hydrogen are there? Give their names.

(N/A) Hydrogen has three isotopes: $(i)$ Protium $({ }_{1}^{1} H)$,$(ii)$ Deuterium (${ }_{1}^{2} H$ or $D$),and $(iii)$ Tritium (${ }_{1}^{3} H$ or $T$).