XZAX2Z2AXX−10X2−120e+XZ+1AX2Z+12AY β− decay is when an atom loses a neutron and gains a proton while shooting off an electron XZAX2Z2AXX+10X2+120e+XZ−1AX2Z−12AY β+ decay is when an atom loses a proton and gains a neutron while shooting off a positron