Isotope(s) of hydrogen which emits low energy $\beta^{-}$ particles with $\mathrm{t}_{1/2}$ value $>12$ years is/are:

JEE Main · 2021 · 22 Jul 2021 · Shift 2 · Hydrogen

Isotope(s) of hydrogen which emits low energy

β^{-}

particles with

t_{1/2}

value

> 12

years is/are:

Answer: (B)

Protium and deuterium are both stable nuclides and do not decay. Tritium,

_{1}^{3} H

, carries two neutrons to one proton and is radioactive; it decays to

_{2}^{3} He

by emitting a

β^{-}

particle of very low energy, with a half-life of about 12.3 years. The isotope described is tritium.

JEE Main · 2021 · 22 Jul 2021 · Shift 2 · Single correct option