Question

In which of the following nuclear reaction neutrons is emitted?

• A. ${}_{13}A{l}^{27}+{}_{2}H{e}^4\to {}_{15}{P}^{30}$
• B. ${}_6{C}^{12}+{}_1{H}^1\to {}_7{N}^{13}$
• C. ${}_{15}{P}^{30}\to {}_{14}S{i}^{30}$
• D. ${}_{96}A{m}^{241}+{}_{2}H{e}^4\to {}_{97}B{k}^{245}$

Answer 1

The correct option is A ${}_{13}A{l}^{27}+{}_{2}H{e}^4\to {}_{15}{P}^{30}$

In the following nuclear reaction neutron is emitted.
${}_{13}A{l}^{27}+{}_{2}H{e}^4\to {}_{15}{P}^{30}+{}_0{n}^1$
Sum of atomic numbers of reactants $=13+2=15$
Sum of atomic numbers of products $=15+0=15$
Sum of atomic numbers of reactants $=$ Sum of atomic numbers of products.
Sum of mass numbers of reactants $=27+4=31$
Sum of mass numbers of products $=30+1=31$
Sum of mass numbers of reactants $=$ Sum of mass numbers of products.