[单选题]
An element X is bombarded with alpha p+-zjk-44u pent t)ovharticles and a new * y9 )jpphkij**r1 l i;r.kx--emc pawelement Y is formed with a neutron emitted. T1h-*;kprjrj i-9 i*y kmxpc)a.w*ep lhe 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.
