Nuclear Physics
Periodic Table

What is the atomic composition of an alpha particle?


Wiki User

The alpha particle is the nucleus of 4He, comprising two neutrons and two protons. It has a atomic mass of 4 and a charge of +2. As a result, it is the least penetrating of all the various emissions (alpha, beta, gamma, neutron) but, unfortunately, it can be the most devastating if it is absorbed, for instance, into the lungs.