[单选题]
An element X is bombarded with alpha pszl+qm (9.z:m-r6 quvx s hq+nartnj)) 1hzp7, v7 soixlb4lntsu82gy;p 2ljf( oicles and a new element Y is formed with a neutron emitted. The fo 7 ln(i yv)z;4)lsgb2xl7 opptosu2j8,1nfhjllowing equation can be written for the nuclear reaction.
The atomic numbers of X and Y are A and B respectively. Which of the following is correct for A and B?
A. A−1=B
B. A+1=B
C. A−2=B
D. A+2=B
参考答案: D
本题详细解析:
Explanation:
The number of protons on both sides of the equation must be the same.
