A $\beta ^ { - }$ Decay Occurs in an Unstable Nucleus When
A) a Neutron

Multiple Choice

A $\beta ^ { - }$ decay occurs in an unstable nucleus when

A) a neutron is converted to an alpha particle by the weak force.
B) a proton is converted to a neutron by the strong force.
C) a proton is converted to an electron by the strong force.
D) a neutron is converted to a positron by the weak force.
E) a neutron is converted to a proton by the weak force.