electrons and protons

The proton has a mass of approximately 1 a.m.u. and a charge of +e. It is the hydrogen nucleus. The charge is equal and opposite to that on the electron, and its mass is approximately two thousand times as large.When a-particles bombard nitrogen, protons are emitted. Since the proton is smaller than the a-particle it has greater penetrating power. It can be deflected by both magnetic and electric fields, because it is electrically charged.