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higher isotopes

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  • Isotopes of dubnium — Dubnium (Db) is an artificial element, and thus a standard atomic mass cannot be given. Like all artificial elements, it has no stable isotopes. The first isotope to be synthesized was 261Db in 1968. There are 12 known radioisotopes from 256Db to …   Wikipedia

  • Isotopes of plutonium — Plutonium (Pu) has no stable isotopes. A standard atomic mass cannot be given.Decay modesTwenty plutonium radioisotopes have been characterized. The most stable are Pu 244, with a half life of 80.8 million years, Pu 242, with a half life of… …   Wikipedia

  • Isotopes of gadolinium — Naturally occurring gadolinium (Gd) is composed of 5 stable isotopes, 154Gd, 155Gd, 156Gd, 157Gd and 158Gd, and 2 radioisotopes, 152Gd and 160Gd, with 158Gd being the most abundant (24.84% natural abundance).Thirty radioisotopes have been… …   Wikipedia

  • Isotopes of nobelium — Nobelium (No) is an artificial element, and thus a standard atomic mass cannot be given. Like all artificial elements, it has no stable isotopes. The first isotope to be synthesized (and correctly identified) was 254No in 1966. There are 16 known …   Wikipedia

  • Isotopes of helium — Although there are eight known isotopes of helium (He) (standard atomic mass: 4.002602(2) u), only helium 3 (SimpleNuclide|Helium|3) and helium 4 (SimpleNuclide|Helium|4) are stable. In the Earth s atmosphere, there is one SimpleNuclide|Helium|3… …   Wikipedia

  • Isotopes of hydrogen — Hydrogen (H) (Standard atomic mass: 1.00794(7) u) has three naturally occurring isotopes, denoted 1H, 2H, and 3H. Other, highly unstable nuclei (4H to 7H) have been synthesized in the laboratory but not observed in nature.Gurov YB, Aleshkin DV,… …   Wikipedia

  • Isotopes of lithium — Naturally occurring lithium (Li) (standard atomic mass: 6.941(2) u) is composed of two stable isotopes (SimpleNuclide|Lithium|6 and SimpleNuclide|Lithium|7, the latter being the more abundant (92.5% natural abundance). Seven radioisotopes have… …   Wikipedia

  • Isotopes of scandium — Naturally occurring scandium (Sc) is composed of 1 stable isotope 45Sc. 13 radioisotopes have been characterized with the most stable being 46Sc with a half life of 83.8 days, 47Sc with a half life of 3.35 days, and 48Sc with a half life of 43.7… …   Wikipedia

  • Isotopes of krypton — There are 31 known isotopes of krypton (Kr). [cite web |url=http://ie.lbl.gov/education/parent/Kr iso.htm |title=Isotopes of Krypton |accessdate=2007 03 20 |publisher=Nuclear Science Division] Naturally occurring krypton is made of five stable… …   Wikipedia

  • Isotopes of rubidium — Rubidium (Rb) has 24 isotopes, with naturally occurring rubidium being composed of just two isotopes; Rb 85 (72.2%) and the radioactive Rb 87 (27.8%). Normal mixes of rubidium are radioactive enough to fog photographic film in approximately 30 to …   Wikipedia

  • List of elements by stability of isotopes — This is a list of the chemical elements and their isotopes, listed in terms of stability. Atomic nuclei consist of protons and neutrons, which attract each other through the strong nuclear force, while protons repel each other via the electric… …   Wikipedia


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