Radioactive Decay

Yesterday we learned about three types of radioactive decay: alpha, beta, and gamma particles. Alpha decay emits helium nuclei, beta decay emits electrons, and gamma decay releases energy in the form of photons. One thing to note is that gamma decay always accompanies alpha and beta decay.

Alpha	Beta	Gamma
α	β	y
Helium nucleus	Electron	Energy
-4 to mass number and -2 to atomic number	No change in mass number but +1 to atomic number	No change in mass

https://www.khanacademy.org/science/chemistry/nuclear-chemistry/radioactive-decay/v/alpha-beta-and-gamma-decay

http://edtech2.boisestate.edu/lindabennett1/502/Nuclear%20Chemistry/types%20of%20decay.html