Radioactivity is the spontaneous and random emission (decay) of particles or rays from a nucleus. The emitted particles and radiation are known as radioactive rays. They were named alpha rays , beta rays  and gamma rays  after the first three letters of Greek alphabet. In this video, we discuss on how to derive the radioactivity equation. We also discuss on how to derive the equation for half-life and sketch the exponential graph .

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Thumbnail: Radioactivity Part 1