Modern Physics 3 Question 31
32. When boron nucleus ${ } _5^{10} B$ is bombarded by neutrons, $\alpha$-particles are emitted. The resulting nucleus is of the element ……….. and has the mass number ….
(1986, 2M)
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Solution:
- ${ } _5 B^{10}+{ } _0 n^{1} \rightarrow{ } _2 He^{4}+{ } _3 Li^{7}$ Therefore, resulting nucleus is lithium and its mass number is 7 .
