Alpha Particle (noun) Definition, Meaning & Examples

noun Physics.
  1. a positively charged particle consisting of two protons and two neutrons, emitted in radioactive decay or nuclear fission; the nucleus of a helium atom.
noun
  1. a helium-4 nucleus, containing two neutrons and two protons, emitted during some radioactive transformations
    Alpha Particle (noun) Definition, Meaning & Examples

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