What are the three most common types of nuclear radiation?

The three types of nuclear radiation are alpha, beta, and gamma radiation. Alpha rays- essentially a helium ion, removes 4 amu, reduces atomic number by 2; Beta rays- 2 different varieties: beta positive rays and beta negative rays. The former occurs in isotopes with too many protons. read more

The first type of radiation, Alpha, consists of two neutrons and two protons bound together to the nucleus of a Helium atom. Though the least powerful of the three types of radiation, alpha particles are nonetheless the most densely ionizing of the three. read more

I'm guessing that you mean emmissions, and those are alpha, beta, and gamma particles. Alpha particles are two protons and two neutrons, essentially a helium atom. read more

The radiation one typically encounters is one of four types: alpha radiation, beta radiation, gamma radiation, and x radiation. Neutron radiation is also encountered in nuclear power plants and high-altitude flight and emitted from some industrial radioactive sources. read more