Alpha Particle

Positively charged particle emitted by various radioactive materials during decayThe spontaneous conversion of a nuclide into another nuclide.... It consists of two neutrons and two protons, and is thus identical to the nucleusPositively charged nucleus of an atom. Its diameter amounts ... of a helium atomSmallest particle of an element which cannot be chemically d.... The rest massThe mass of a particle at rest. According to the theory of r... of the alpha particle amounts to 6.64424·10^-27 kg, or 3.7273·10⁹ eVSymbol for electron volt.. Alpha radiationEnergy dispersion through matter or space. In atomic physics... is the radiationEnergy dispersion through matter or space. In atomic physics... with the lowest penetration potential of the three radiationEnergy dispersion through matter or space. In atomic physics... types (alpha, beta, gamma radiationHighly-energetic, short-wave electromagnetic radiation emitt...). Alpha radiationEnergy dispersion through matter or space. In atomic physics... can already be stopped by a sheet of paper and is only dangerous for living creatures if the substance emitting alpha rays is inhaled or ingested with food or enters wounds.