Alpha particles are ………….........charged................ ions and have a mass of ................... *
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Alpha particle, positively charged particle, identical to the nucleus of the helium-4 atom, spontaneously emitted by some radioactive substances, consisting of two protons and two neutrons bound together, thus having a mass of four units and a positive charge of two.
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Alpha particles are twice positively charged Helium ions and have a mass of 4 amu.
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