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1. Process in which an unstable atomic nucleus emits charged particles and energy. Chain Reaction Radioactivity Critical Mass Strong Nuclear Force Radioisotope Half-life Fission Gamma Ray Nuclear Radiation Beta Particle Fusion Alpha Particle Background Radiation
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2. Time required for one half of a sample of a radioisotope to decay. Chain Reaction Radioactivity Critical Mass Strong Nuclear Force Radioisotope Half-life Fission Gamma Ray Nuclear Radiation Beta Particle Fusion Alpha Particle Background Radiation
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3. Attractive force that binds protons and neutrons together in the nucleus. Chain Reaction Radioactivity Critical Mass Strong Nuclear Force Radioisotope Half-life Fission Gamma Ray Nuclear Radiation Beta Particle Fusion Alpha Particle Background Radiation
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4. Any atom containing an unstable nucleus. Chain Reaction Radioactivity Critical Mass Strong Nuclear Force Radioisotope Half-life Fission Gamma Ray Nuclear Radiation Beta Particle Fusion Alpha Particle Background Radiation
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5. Splitting of an atomic nucleus into two smaller parts. Chain Reaction Radioactivity Critical Mass Strong Nuclear Force Radioisotope Half-life Fission Gamma Ray Nuclear Radiation Beta Particle Fusion Alpha Particle Background Radiation
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6. Charged particles and energy that are emitted from the nuclei of radioisotopes. Chain Reaction Radioactivity Critical Mass Strong Nuclear Force Radioisotope Half-life Fission Gamma Ray Nuclear Radiation Beta Particle Fusion Alpha Particle Background Radiation
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7. A series of fission reactions triggered by neutrons released during the fission of a nucleus. Chain Reaction Radioactivity Critical Mass Strong Nuclear Force Radioisotope Half-life Fission Gamma Ray Nuclear Radiation Beta Particle Fusion Alpha Particle Background Radiation
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8. Positively charged particle made up of two protons and two neutrons. Chain Reaction Radioactivity Critical Mass Strong Nuclear Force Radioisotope Half-life Fission Gamma Ray Nuclear Radiation Beta Particle Fusion Alpha Particle Background Radiation
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9. Smallest possible mass of a fissionable material that can sustain a chain reaction. Chain Reaction Radioactivity Critical Mass Strong Nuclear Force Radioisotope Half-life Fission Gamma Ray Nuclear Radiation Beta Particle Fusion Alpha Particle Background Radiation
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10. An electron emitted by an unstable nucleus. Chain Reaction Radioactivity Critical Mass Strong Nuclear Force Radioisotope Half-life Fission Gamma Ray Nuclear Radiation Beta Particle Fusion Alpha Particle Background Radiation
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11. Penetrating ray of energy emitted by an unstable nucleus. Chain Reaction Radioactivity Critical Mass Strong Nuclear Force Radioisotope Half-life Fission Gamma Ray Nuclear Radiation Beta Particle Fusion Alpha Particle Background Radiation
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12. Nuclear radiation that occurs naturally in the environment. Chain Reaction Radioactivity Critical Mass Strong Nuclear Force Radioisotope Half-life Fission Gamma Ray Nuclear Radiation Beta Particle Fusion Alpha Particle Background Radiation
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13. Process in which the nuclei of two atoms combine to form a larger nucleus. Chain Reaction Radioactivity Critical Mass Strong Nuclear Force Radioisotope Half-life Fission Gamma Ray Nuclear Radiation Beta Particle Fusion Alpha Particle Background Radiation