Isotopes of molybdenum
Nuclides with atomic number of 42 but with different mass numbers / From Wikipedia, the free encyclopedia
"Mo-99" redirects here. For MO99 Freon mix R438A, see refrigerant.
Molybdenum (42Mo) has 39 known isotopes, ranging in atomic mass from 81 to 119, as well as four metastable nuclear isomers. Seven isotopes occur naturally, with atomic masses of 92, 94, 95, 96, 97, 98, and 100. All unstable isotopes of molybdenum decay into isotopes of zirconium, niobium, technetium, and ruthenium.[5]
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Molybdenum-100, with a half-life of approximately 8.5×1018 y, is the only naturally occurring radioisotope. It undergoes double beta decay into ruthenium-100. Molybdenum-98 is the most common isotope, comprising 24.14% of all molybdenum on Earth. Molybdenum isotopes with mass numbers 111 and up all have half-lives of approximately .15 s.[5]