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1 radioactive
[ˌreɪdɪəʊ'æktɪv]aggettivo radioattivo* * *[reidiəu'æktiv]1) ((of some substances, eg uranium) giving off rays which can be dangerous, but which can also be used in eg medicine: radioactive metals.) radioattivo2) (containing radioactive substances: radioactive waste/dust.) radioattivo•* * *radioactive /reɪdɪəʊˈæktɪv/a.(chim., fis.) radioattivo: radioactive decay, decadimento radioattivo; radioactive fallout, ricaduta radioattiva; fallout.* * *[ˌreɪdɪəʊ'æktɪv]aggettivo radioattivo
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Radioactive decay — For particle decay in a more general context, see Particle decay. For more information on hazards of various kinds of radiation from decay, see Ionizing radiation. Radioactive redirects here. For other uses, see Radioactive (disambiguation).… … Wikipedia
Uranium-lead dating — Uranium lead is one of the oldest and most refined radiometric dating schemes, with a routine age range of about 1 million years to over 4.5 billion years, and with routine precisions in the 0.1 1 percent range. [Parrish, Randall R.; Noble,… … Wikipedia
Some radioactive decay series — ▪ Table Some radioactive decay series element radioactive isotope final product isotopic abundance (%) half life (in 109 years) uranium U 235 Pb 207 0.72 0.7 U 238 Pb 206 99.28 4.5 thorium Th 232 Pb 208 100.0 14.0 potassium K 40 (89%)… … Universalium
Uranium mining — The Ranger Uranium Mine in Australia … Wikipedia
uranium-thorium-lead dating — or common lead dating Method of dating very old rocks by means of the amount of common lead they contain. Common lead is any lead from a rock or mineral that contains a large amount of lead and a small amount of the radioactive precursors of lead … Universalium
uranium-234-uranium–238 dating — Method of age determination that makes use of the radioactive decay of uranium 238 to uranium 234; the method can be used for dating sediments from either a marine or a playa lake environment. Because this method is useful for the period с… … Universalium
uranium-234–uranium-238 dating — method of age determination that makes use of the radioactive decay of uranium 238 to uranium 234; the method can be used for dating of sediments from either a marine or a playa lake environment. Because this method is useful for the period … Universalium
Uranium — (pronEng|jʊˈreɪniəm) is a silvery gray metallic chemical element in the actinide series of the periodic table that has the symbol U and atomic number 92. It has 92 protons and 92 electrons, 6 of them valence electrons. It can have between 141 and … Wikipedia
Uranium-uranium dating — is a radiometric dating technique utilizing the comparison of two isotopes of uranium (U) in a sample: 234U and 238U. 234U/238U dating is one of several radiometric dating techniques exploiting the uranium radioactive decay series, in which 238U… … Wikipedia
Uranium tailings — are a waste material of uranium mining. In mining, the raw uranium ore is brought to the surface and crushed into a fine sand. The valuable uranium bearing minerals are then mechanically removed, and the remaining radioactive sand, called uranium … Wikipedia
Radioactive waste — 2007 ISO radioactivity danger logo, designed in part for long term radioactive waste depositories which might survive into a far future time in which all knowledge of the meaning of present common radiation danger symbols and signs has been lost… … Wikipedia