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Darian Villarreal
Physics
23 March, 02:32
Why are some atoms radioactive
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Eliza Roberson
23 March, 02:41
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Atoms are made of three types of sub-atomic particle: neutrons and protons in the nucleus and electrons orbiting the nucleus. Some materials are radioactive because the nucleus of each atom is unstable and gives out nuclear radiation in the form of alpha particles, beta particles or gamma rays.
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