A beta-minus decay produces a daughter nucleus in an excited state. The daughter nucleus then emits gamma radiation.
Which statement describes the numbers of protons and neutrons in the daughter nucleus during the gamma emission?
the proton number and the neutron number each decrease by two
the numbers of protons and neutrons both stay the same
the proton number decreases by one and the neutron number increases by one
the proton number increases by one and the neutron number decreases by one