| cobalt isotopes | <radiobiology, physics> Stable cobalt atoms that have the same atomic number as the element cobalt, but differ in atomic weight. Co-59 is a stable cobalt isotope. (12 Dec 1998) |
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| chrome-cobalt alloys | Alloy's of cobalt and chromium containing molybdenum and/or tungsten plus trace elements; used in dentistry for denture bases and frameworks, and other structures. (05 Mar 2000) |
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| cobalt | <chemical> A trace element that is a component of vitamin b12. It has the atomic symbol co, atomic number 27, and atomic weight 58.93. It is used in nuclear weapons, alloys, and pigments. Deficiency in animals leads to anaemia; its excess in humans can lead to erythrocytosis. Chemical name: Cobalt (12 Dec 1998) |
| cobalt-57 | <radiobiology> A radioisotope with a half-life of 271.8 days. It decays by electron capture with emission of a medium energy (122.06 keV) gamma ray. Used as a diagnostic aid with some metabolic disorders. (17 Jul 2002) |
| cobalt-58 | <radiobiology> Positron emitter with half-life of 70.88 days. (05 Mar 2000) |
| cobalt-60 | <radiobiology> A radioisotope with a half-life of 5.271 years. It emits beta particles and energetic gamma rays, for which reason it is used in radiation therapy and diagnostics in place of radium or X-rays. It is also used as a diagnostic aid in vitamin B12-related problems. (05 Mar 2000) |
| cobalt machine | <apparatus> A simple but effective source of irradiation which is employed for external beam radiotherapy. It has limited ability to focus irradiation. (16 Dec 1997) |
| cobalt radioisotopes | Unstable isotopes of cobalt that decay or disintegrate emitting radiation. Co atoms with atomic weights of 54-64, except 59, are radioactive cobalt isotopes. (12 Dec 1998) |
| calcium isotopes | Stable calcium atoms that have the same atomic number as the element calcium, but differ in atomic weight. Ca-42-44, 46, and 48 are stable calcium isotopes. (12 Dec 1998) |
| carbon isotopes | Stable carbon atoms that have the same atomic number as the element carbon, but differ in atomic weight. C-13 is a stable carbon isotope. (12 Dec 1998) |
| gallium isotopes | Stable gallium atoms that have the same atomic number as the element gallium, but differ in atomic weight. Ga-71 is a stable gallium isotope. (12 Dec 1998) |
| cerium isotopes | Stable cerium atoms that have the same atomic number as the element cerium, but differ in atomic weight. Ce-136, 138, and 142 are stable cerium isotopes. (12 Dec 1998) |
| gold isotopes | Stable gold atoms that have the same atomic number as the element gold, but differ in atomic weight. Au-197 is a stable isotope. (12 Dec 1998) |
| cesium isotopes | Stable cesium atoms that have the same atomic number as the element cesium, but differ in atomic weight. Cs-133 is a naturally occurring isotope. (12 Dec 1998) |
| mercury isotopes | Stable mercury atoms that have the same atomic number as the element mercury, but differ in atomic weight. Hg-196, 198-201, and 204 are stable mercury isotopes. (12 Dec 1998) |
| chromium isotopes | Stable chromium atoms that have the same atomic number as the element chromium, but differ in atomic weight. Cr-50, 53, and 54 are stable chromium isotopes. (12 Dec 1998) |