What is the mass number and charge of the beta particle that is emitted from the nucleus in beta decay?
a
The mass of a beta particle is 1 and the charge is 0.
b
The mass of a beta particle is 0 and the charge is -1.
c
The mass of a beta particle is 0 and the charge is +1.
d
The mass of a beta particle is 4 and the charge is 2.