question_answer

A nuclear transformation is denoted, by\[X(n,\text{ }\alpha )\to _{3}^{7}Li\]. Which of the following is the nucleus of element X?                [AIEEE 2005]

A) \[_{6}^{12}C\]

B) \[_{5}^{10}B\]

C) \[_{5}^{9}B\]

D) \[_{4}^{11}Be\]

Correct Answer: B

Solution :

[b] As

it implies that

and

Thus, it is boron .