A nuclear transformation is denoted by $X(n,\alpha){}_{3}^{7}\mathrm{Li}$. Which of the following is the nucleus of element $X$? (1) ${}^{12}\mathrm{C}_6$ (2) ${}_{5}^{10}\mathrm{B}$ (3) ${}_{5}^{9}\mathrm{B}$ (4) ${}_{4}^{11}\mathrm{Be}$
A nuclear transformation is denoted by $X(n,\alpha){}_{3}^{7}\mathrm{Li}$. Which of the following is the nucleus of element $X$?\\
(1) ${}^{12}\mathrm{C}_6$\\
(2) ${}_{5}^{10}\mathrm{B}$\\
(3) ${}_{5}^{9}\mathrm{B}$\\
(4) ${}_{4}^{11}\mathrm{Be}$