Radioactivity, the spontaneous disintegration by the emission of particles. Such large nuclei are unstable and undergo If you look at the periodic table, you will notice that all elements after bismuth, atomic number 83, have their atomic mass denoted by an integer within parentheses. Quiz: Introduction to Oxidation-Reduction Reactions.Introduction to Oxidation-Reduction Reactions.Quiz: Heat Capacities and Transformations.Quiz: Introduction to Organic Compounds.
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