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The top documents tagged [certain atomic number]
Proton A nuclear particle having a positive charge equal to that of the electron and a mass more than 1800 times that of the electron The number of
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Chapter 24 Radioactivity and Nuclear Reactions. Henri Bequerel accidentally discovered radioactivity when he left some uranium salt in a desk drawer with
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Nuclear Physics and Radioactivity. Online Introduction to Nuclear Physics one/lesson/12nuclear/intronuc.htm
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