| 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) |
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| 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) |
| 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) |
| potassium isotopes | Stable potassium atoms that have the same atomic number as the element potassium, but differ in atomic weight. K-41 is a stable potassium isotope. (12 Dec 1998) |
| 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) |
| sodium isotopes | Stable sodium atoms that have the same atomic number as the element sodium, but differ in atomic weight. Na-23 is a stable sodium isotope. (12 Dec 1998) |
| strontium isotopes | Stable strontium atoms that have the same atomic number as the element strontium, but differ in the atomic weight. Sr-84, 86, 87, and 88 are the stable strontium isotopes. (12 Dec 1998) |
| nitrogen isotopes | Stable nitrogen atoms that have the same atomic number as the element nitrogen, but differ in atomic weight. N-15 is a stable nitrogen isotope. (12 Dec 1998) |
| sulfur isotopes | Stable sulfur atoms that have the same atomic number as the element sulfur, but differ in atomic weight. S-33, 34, and 36 are stable sulfur isotopes. (12 Dec 1998) |
| iodine isotopes | Stable iodine atoms that have the same atomic number as the element iodine, but differ in atomic weight. I-127 is the only naturally occurring stable iodine isotope. (12 Dec 1998) |
| iron isotopes | Stable iron atoms that have the same atomic number as the element iron, but differ in atomic weight. Fe-54, 57, and 58 are stable iron isotopes. (12 Dec 1998) |
| isotopes | Atomic species differing in mass number but having the same atomic number. (12 Dec 1998) |