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Definition
| the process by which an unstable nucleus emits one or more particles or energy in the form of electromagnetic radiation |
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| the particles that are released from the nucleus during radioactive decay, such as neutrons, electrons, and photons |
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Definition
| a positively charged atom that is released in the disintegration of radioactive elements and that consists of two protons and two neutrons |
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Definition
| a charged electron emitted during certain types of radioactive decay, such as beta decay |
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Definition
| the high-energy photon emitted by a nucleus during fission and radioactive decay |
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Definition
| the time required for half of a sample of a radioactive isotope to break down by radioactive decay to form a daughter isotope |
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Definition
| a type of asexual reproduction in which an organism splits into two or more similar and complete parts |
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Definition
| a continuous series of nuclear fission reactions |
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Definition
| the minimum mass of a fissionable isotope that provides the number of neutrons needed to sustain a chain reaction |
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Definition
| the process in which light nuclei combine at extremely high temperatures, forming heavier nuclei and releasing energy |
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Definition
| the nuclear radiation that arises naturally from cosmic rays and from radioactive isotopes in the soil and air |
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Definition
| the quantity of ionizing radiation that does as much damage to human tissue as 1 roentgen of high-voltage X rays does |
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Definition
| a radioactive material that is added to a substance so that its distribution can be detected later |
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