Answers

2015-07-27T21:08:05+08:00
Radioactivity refers to the particles  which are emitted from nuclei as a result of nuclear instability. because of the nucleus experiences the intense conflict between the two strongest forces in the nature.
                                                     

                                                        I hope my answer will you :)
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2015-07-28T16:12:21+08:00
THE EMISSION OF IONIZING RADIOTION OR PARTICLES.
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