[单选题]
An element X is bombarded with alpha particle )rjvip3uh .w8s and a new l5222 u* :ogbv qdc mnle-cs)aelement Y is formed with a 2g2 b c lq:v)m2uesd-a ol*nc5neutron emitted. The following 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.
