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  Solved  Paper-2005

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

B) \[_{5}^{10}B\]                  

C) \[_{5}^{9}B\]                    

D)        \[_{4}^{11}Be\]

Correct Answer: B

Solution :

As \[_{Z}^{A}X+_{0}^{1}n\,\to \,_{3}^{7}Li\,+_{2}^{4}He\] it implies that and Thus, it is boron .