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Why are only certain elements radioactive ?

Atomic nuclei contain protons and neutrons. The stability of a nucleus depends upon the number of protons and neutrons are nearly equal, then the nucleus is stable. The nuclei in which the number of neutrons is more than the number of protons are unstable.

By |2010-12-30T17:29:33+00:00December 30, 2010|Chemistry|Comments Off on Why are only certain elements radioactive ?
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