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Download QR code; Print/export Download as PDF; Printable version; In other projects ... 10.74 339 krypton-85: 10.756 339.4 hydrogen-3 (also known as tritium) 12.32
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).
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.
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 ...
Kritios Boy.Marble, c. 480 BC. Acropolis Museum, Athens.. The marble Kritios Boy or Kritian Boy belongs to the Early Classical period of ancient Greek sculpture.It is the first statue from classical antiquity known to use contrapposto; [1] Kenneth Clark called it "the first beautiful nude in art" [2] The Kritios Boy is thus named because it is attributed, on slender evidence, [2] to Kritios ...
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.