what is alpha decay? give an example
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An alpha particle is identical to the nucleus of a helium-4 atom, which consists of two protons and two neutrons. It has a charge of +2 e and a mass of 4 u. For example, uranium-238 decays to form thorium-234. ... Alpha decay typically occurs in the heaviest nuclides.
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Alpha decay, type of radioactive disintegration in which some unstable atomic nuclei dissipate excess energy by spontaneously ejecting an alpha particle
example, uranium-238 decays to form thorium-234
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