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A radioactive element of the actinide series of metals. It has an atomic symbol Th, atomic number 90, and atomic weight 232.04. It is used as fuel in nuclear reactors to produce fissionable uranium isotopes. Because of its radioopacity, various thorium compounds are used to facilitate visualization in roentgenography. CID10 - Classificação Internacional de Doenças DeCS Português DeCS Inglês DeCS Espanhol DeCS Espanha DeCS Português com escopo DeCS Inglês com escopo DeCS Espanhol com escopo DeCS Espanha com escopo LILACS - LILACS Regional
DeCS Categories D01 Inorganic Chemicals . D01.268 Elements . D01.268.271 Elements, Radioactive . D01.268.271.100 Actinoid Series Elements . D01.268.271.100.150 Californium . D01.268.271.100.700 Plutonium . D01.268.271.100.900 Thorium . D01.268.271.100.950 Uranium . D01.268.271.720 Promethium . D01.268.549 Metals, Alkali . D01.268.549.650 Rubidium . D01.268.556 Metals, Heavy . D01.268.556.156 Californium . D01.268.556.700 Plutonium . D01.268.556.800 Rubidium . D01.268.556.850 Thorium . D01.268.556.900 Uranium . D01.268.558 Metals, Rare Earth . D01.268.558.362 Lanthanoid Series Elements . D01.268.558.362.484 Gadolinium . D01.268.558.362.625 Neodymium . D01.268.558.362.875 Promethium . D01.268.558.362.937 Samarium . D01.268.666 Phosphorus . D01.496 Isotopes . D01.496.749 Radioisotopes . D01.496.749.305 Elements, Radioactive . D01.496.749.305.100 Actinoid Series Elements . D01.496.749.305.100.150 Californium . D01.496.749.305.100.700 Plutonium . D01.496.749.305.100.900 Thorium . D01.496.749.305.100.950 Uranium . D01.496.749.305.720 Promethium . D01.552 Metals . D01.552.020 Actinoid Series Elements . D01.552.020.200 Californium . D01.552.020.734 Plutonium . D01.552.020.889 Thorium . D01.552.020.940 Uranium . D01.552.528 Metals, Alkali . D01.552.528.759 Rubidium . D01.552.544 Metals, Heavy . D01.552.544.156 Californium . D01.552.544.700 Plutonium . D01.552.544.800 Rubidium . D01.552.544.850 Thorium . D01.552.544.900 Uranium . D01.552.550 Metals, Rare Earth . D01.552.550.399 Lanthanoid Series Elements . D01.552.550.399.484 Gadolinium . D01.552.550.399.625 Neodymium . D01.552.550.399.875 Promethium . D01.552.550.399.937 Samarium . SP4 Environmental Health . SP4.011 Science . SP4.011.097 Chemistry . SP4.011.097.063 Elements . SP4.011.097.063.879 Elements, Radioactive . SP4.011.097.063.879.590 Uranium . SP4.011.097.063.894 Phosphorus . SP4.011.097.063.969 Plutonium .		Terms  Synonyms & Historicals Documents LILACS e MDL   Thorium . A radioactive element of the actinide series of metals. It has an atomic symbol Th, atomic number 90, and atomic weight 232.04. It is used as fuel in nuclear reactors to produce fissionable uranium isotopes. Because of its radioopacity, various thorium compounds are used to facilitate visualization in roentgenography. . 1.00   Uranium . A radioactive element of the actinide series of metals. It has an atomic symbol U, atomic number 92, and atomic weight 238.03. U-235 is used as the fissionable fuel in nuclear weapons and as fuel in nuclear power reactors. . 0.51   Plutonium . A naturally radioactive element of the actinide metals series. It has the atomic symbol Pu, and atomic number 94. Plutonium is used as a nuclear fuel, to produce radioisotopes for research, in radionuclide batteries for pacemakers, and as the agent of fission in nuclear weapons. . 0.47   Gadolinium . An element of the rare earth family of metals. It has the atomic symbol Gd, atomic number 64, and atomic weight 157.25. Its oxide is used in the control rods of some nuclear reactors. . 0.44   Samarium . An element of the rare earth family of metals. It has the atomic symbol Sm, atomic number 62, and atomic weight 150.36. The oxide is used in the control rods of some nuclear reactors. . 0.44   Rubidium . An element that is an alkali metal. It has an atomic symbol Rb, atomic number 37, and atomic weight 85.47. It is used as a chemical reagent and in the manufacture of photoelectric cells. . 0.42   Promethium . A radioactive element of the rare earth family of metals. It has the atomic symbol Pm, and atomic number 61. It has been used in the construction of atomic batteries, in the preparation of self-luminous compounds, and as a beta-particle source for thickness gauges. . 0.42   Phosphorus . Phosphorus-31 . Red Phosphorus . Phosphorus 31 . Phosphorus, Red . A non-metal element that has the atomic symbol P, atomic number 15, and atomic weight 31. It is an essential element that takes part in a broad variety of biochemical reactions. . 0.41   Neodymium . An element of the rare earth family of metals. It has the atomic symbol Nd, atomic number 60, and atomic weight 144.24, and is used in industrial applications. . 0.41   Californium . A man-made radioactive actinide with atomic symbol Cf, atomic number 98, and atomic weight 251. Its valence can be +2 or +3. Californium has medical use as a radiation source for radiotherapy. . 0.41