Radioactive decay

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Alpha decay is ane example type o radioactive decay, in which an atomic nucleus emits an alpha particle, an tharebi transforms (or 'decays') intae an atom wi a mass nummer decreased bi 4 an atomic nummer decreased bi 2. Mony ither types o decays are possible.

Radioactive decay, an aa kent as nuclear decay or radioactivity, is the process bi which a nucleus o an unstable atom loses energy bi emittin pairticles o ionizin radiation. A material that spontaneously emits this kind o radiation—which includes the emission o energetic alpha pairticles, beta pairticles, an gamma rays—is considered radioactive.