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A further 10 nuclides, platinum-190, samarium-147, lanthanum-138, rubidium-87, rhenium-187, lutetium-176, thorium-232, uranium-238, potassium-40, and uranium-235 have half-lives between 7.0 × 10 8 and 4.83 × 10 11 years, which means they have experienced at least 0.5% depletion since the formation of the Solar System about 4.6 × 10 9 years ...
This page lists radioactive nuclides by their half-life.
A chemical element is a chemical substance whose atoms all have the same number of protons.The number of protons is called the atomic number of that element. For example, oxygen has an atomic number of 8, meaning each oxygen atom has 8 protons in its nucleus.
118 chemical elements have been identified and named officially by IUPAC.A chemical element, often simply called an element, is a type of atom which has a specific number of protons in its atomic nucleus (i.e., a specific atomic number, or Z).
Phosgene is an insidious poison as the odor may not be noticed and symptoms may be slow to appear. [ 31 ] At low concentrations, phosgene may have a pleasant odor of freshly mown hay or green corn, [ 32 ] but has also been described as sweet, like rotten banana peels.
8 Out of 10 Cats Does Countdown is a British comedy panel show on Channel 4. The show follows the game of Countdown, but presented in a comedy panel show format seen on 8 Out of 10 Cats, with the show being a crossover of the two. The show is hosted by Jimmy Carr, with Rachel Riley and Susie Dent assuming their Countdown roles.
DC Universe Online (DCUO) is a free-to-play massively multiplayer online game [2] set in the fictional universe of DC Comics.Developed by Dimensional Ink Games and co-published by Daybreak Game Company and WB Games, the game was initially released in January 2011 for Windows and PlayStation 3.