Question

A nitrogen nucleus ${}_7{N}^{1}4$ absorbs a neutron and can transform into lithium nucleus ${}_{3}L{i}^7$ under suitable conditions, after emitting

• A. 4 protons and 3 neutrons
• B. 5 protons and 1 negative beta particle
• C. 2 alpha particles and 2 gamma particle
• D. 1 alpha particle, 4 protons and 2 negative beta particles.

Answer 1

The correct option is A 4 protons and 3 neutrons

Total No. of emitted proton $\left(N_p\right)=$ Atomic no. of Nitrogen - Atomic no. of lithium

$\Rightarrow N_p=7-3=4$

And,Total No. of emitted nucleus $\left(N_n\right)=$ Mass no. of Nitrogen - Mass no. of lithium - No.of proton emitted

$\Rightarrow N_n=14-7-4=3$