| xenon radioisotopes | Unstable isotopes of xenon that decay or disintegrate emitting radiation. Xe atoms with atomic weights 121-123, 125, 127, 133, 135, 137-145 are radioactive xenon isotopes. (12 Dec 1998) |
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| xenon | <chemical> A noble gas with the atomic symbol xe, atomic number 54, and atomic weight 131.30. It is found in the earth's atmosphere and has been used as an anaesthetic. Pharmacological action: anaesthetics, inhalation. Chemical name: Xenon (12 Dec 1998) |
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| xenon 133 | <radiology> Xe-133, half-life: 5.2 days, 80 keV photon, dose for V/Q imaging = 20 mCi Cf: other lung ventilation agents (12 Dec 1998) |
| xenon-133 | A radioisotope of xenon with a gamma emission at 81 keV and a physical half-life of 5.243 days; used in the study of pulmonary function and organ blood flow. (05 Mar 2000) |
| xenon isotopes | Stable xenon atoms that have the same atomic number as the element xenon, but differ in atomic weight. Xe-124, 126, 128-131, 134, and 136 are stable xenon isotopes. (12 Dec 1998) |
| barium radioisotopes | Unstable isotopes of barium that decay or disintegrate emitting radiation. Ba atoms with atomic weights 126-129, 131, 133, and 139-143 are radioactive barium isotopes. (12 Dec 1998) |
| bromine radioisotopes | Unstable isotopes of bromine that decay or disintegrate emitting radiation. Br atoms with atomic weights 74-78, 80, and 82-90 are radioactive bromine isotopes. (12 Dec 1998) |
| cadmium radioisotopes | Unstable isotopes of cadmium that decay or disintegrate emitting radiation. Cd atoms with atomic weights 103-105, 107, 109, 115, and 117-119 are radioactive cadmium isotopes. (12 Dec 1998) |
| calcium radioisotopes | Unstable isotopes of calcium that decay or disintegrate emitting radiation. Ca atoms with atomic weights 39, 41, 45, 47, 49, and 50 are radioactive calcium isotopes. (12 Dec 1998) |
| carbon radioisotopes | Unstable isotopes of carbon that decay or disintegrate emitting radiation. C atoms with atomic weights 10, 11, and 14-16 are radioactive carbon isotopes. (12 Dec 1998) |
| gallium radioisotopes | Unstable isotopes of gallium that decay or disintegrate emitting radiation. Ga atoms with atomic weights 63-68, 70 and 72-76 are radioactive gallium isotopes. (12 Dec 1998) |
| radioisotopes | Isotopes that exhibit radioactivity and undergo radioactive decay. (12 Dec 1998) |
| cerium radioisotopes | Unstable isotopes of cerium that decay or disintegrate emitting radiation. Ce atoms with atomic weights 132-135, 137, 139, and 141-148 are radioactive cerium isotopes. (12 Dec 1998) |
| gold radioisotopes | Unstable isotopes of gold that decay or disintegrate emitting radiation. Au 185-196, 198-201, and 203 are radioactive gold isotopes. (12 Dec 1998) |
| cesium radioisotopes | Unstable isotopes of cesium that decay or disintegrate emitting radiation. Cs atoms with atomic weights of 123, 125-132, and 134-145 are radioactive cesium isotopes. (12 Dec 1998) |
| mercury radioisotopes | Unstable isotopes of mercury that decay or disintegrate emitting radiation. Hg atoms with atomic weights 185-195, 197, 203, 205, and 206 are radioactive mercury isotopes. (12 Dec 1998) |