12: Chapter 10 - Nuclear Chemistry
- Page ID
- 370369
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- 12.1: Radioactivity and Decay Types
- Atoms are composed of subatomic particles—protons, neutrons, and electrons. Protons and neutrons are located in the nucleus and provide most of the mass of the atom, while electrons circle the nucleus in shells and subshells and account for an atom’s size. There are three main forms of radioactive emissions and are alpha particles, beta particles, and gamma rays.
- 12.2: Half-Life
- Natural radioactive processes are characterized by a half-life, the time it takes for half of the material to decay radioactively. The amount of material left over after a certain number of half-lives can be easily calculated.
- 12.3: Units of Radioactivity
- Radioactivity can be expressed in a variety of units, including rems, rads, and curies.
- 12.4: Applications of Radioactivity
- Radioactivity has several practical applications, including tracers, medical applications, dating once-living objects, and the preservation of food.