Modern Physics Ques 131
- 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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Answer:
Correct Answer: 131.(Lithium, $7$ )
Solution:
Formula:
- ${ } _5 B^{10}+{ } _0 n^{1} \rightarrow{ } _2 He^{4}+{ } _3 Li^{7}$
Therefore, resulting nucleus is lithium and its mass number is $7$ .
BETA
