Question

Which of the following forms of hydrogen emits low energy $\beta^{-}$ particles?

• A. Deuterium ${ }_{1}^{2} H$
  
• B. Tritium ${ }_{1}^{3} H$
  
• C. Protium ${ }_{1}^{1} H$
  
• D. Proton $H ^{+}$

Answer 1

Answer: (B)

For tritium $\left({ }_{1}^{3} H \right)$

No. of neutron $( n )=2$

No. of proton $( p )=1$

$\frac{ n }{ p }=2$

$\because \frac{ n }{ p }$ is high

tritium wil emit $\beta$ particle.