If a nucleus gains a neutron and then undergoes beta emission,_____.
A) its atomic number decreases by one and its mass number increases by one
B) its atomic number is unchanged and its mass number increases by one
C) both its atomic number and its mass number are unchanged
D) its atomic number increases by one and its mass number is unchanged
E) its atomic number increases by one and its mass number increases by one
Correct Answer:
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