Which statement below is TRUE of the mass number of the daughter atom that is produced during positron emission? (Use the picture above to help you with your answer.)

Question

a
The mass number of the daughter atom is 1 more than the parent atom.
b
The mass number of the daughter atom is 1 less than the parent atom.
c
The mass number of the daughter atom is 4 less than the parent atom.
d
The mass number of the daughter atom is the same as the parent atom.

Answer 1

b
The mass number of the daughter atom is 1 less than the parent atom.