Radioactive Decay

There are three kinds of radioactive decay, Alpha decay, Beta decay, and Gamma decay. Alpha decay always has a helium nucleus, it has a mas number of four and an atomic mass of negative two. Beta decay is when a neutron changes into a proton, its mass number remains unchanged and its atomic number adds one. Gamma decay has no change in both its mass number and atomic number. It always accompanies alpha and beta decay. So even when a decay formula doesn't have gamma listed, we know it's there, it's just not implied.