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0:48
YouTube
Science World
Theory of radioactivity | Science World
The theory of radioactivity, developed in the late 19th and early 20th centuries, describes the process by which unstable atomic nuclei spontaneously emit particles and energy. This phenomenon was first observed by Henri Becquerel and further researched by Marie and Pierre Curie, who discovered the elements polonium and radium. Radioactivity ...
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Jun 25, 2024
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