a) $$^{27}_{13}Al + ^1_0n \rightarrow ^{24}_{11}Na + ^{4}_{2}He$$
b) $$^{23}_{12}Mg + ^1_1H \rightarrow ^{20}_{10}Ne + ^{4}_{2}He$$
в) $$^{14}_7N + ^1_0n \rightarrow ^{11}_{5}B + ^4_2He$$