[单选题]
When a gamma ray is emittey tj.d 6td7 wjc+ 6s,82y;krkej npb2rd froy rk8-14 qw fyk5e6tqbxj -z/sx0ls3bm an unstable nucleus,
A. the number of neutrons and the number of protons drop by two.
B. the number of neutrons drops by one and the number of protons increases by one.
C. there is no change in either the number of neutrons or the number of protons.
D. none of the given answers
Post time 2024-1-22 01:01:29