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Questions  >>  CBSE XI  >>  Chemistry  >>  Structure of Atom
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Why some atoms shows radioactivity?

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When the number of neutrons exceeds the number of protons in the nucleus of atom, it becomes unstable and shows radioactivity. For eg , $_6 C^{ 12}$ has 6 protons and 6 neutrons so it stable while $_6 C^{ 14}$ has 6 protons and 8 neutrons is unstable and shows radioactivity.
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