“thorium”的概念、定义、翻译、参考文献-科学参考

thorium

Physics

Symbol Th. A grey radioactive metallic element belonging to the actinoids; a.n. 90; r.a.m. 232.038; r.d. 11.5–11.9 (17°C); m.p. 1740–1760°C; b.p. 4780–4800°C. It occurs in monazite sand in Brazil, India, and the USA. The isotopes of thorium have mass numbers from 223 to 234 inclusive; the most stable isotope, thorium–232, has a half-life of 1.39 × 10¹⁰ years. It can be used as a nuclear fuel for breeder reactors as thorium–232 captures slow neutrons to breed uranium–233. Thorium dioxide (thoria, ThO₂) is used on gas mantles and in special refractories. The element was discovered by Jöns Jacob Berzelius (1779–1848) in 1828.

Chemistry

A grey radioactive metallic element belonging to the actinoids; a.n. 90; r.a.m. 232.038; r.d. 11.5–11.9 (17°C); m.p. 1740–1760°C; b.p. 4780–4800°C. It occurs in monazite sand in Brazil, India, and USA. The isotopes of thorium have mass numbers from 223 to 234 inclusive; the most stable isotope, thorium-232, has a half-life of 1.39×10¹⁰ years. It has an oxidation state of (+4) and its chemistry resembles that of the other actinoids. It can be used as a nuclear fuel for breeder reactors as thorium‐232 captures slow neutrons to breed uranium‐233. Thorium dioxide (thoria, ThO₂) is used on gas mantles and in special refractories. The element was discovered by J. J. Berzelius in 1829.
https://www.webelements.com/thorium/ Information from the WebElements site

单词	thorium
释义	thorium Physics Symbol Th. A grey radioactive metallic element belonging to the actinoids; a.n. 90; r.a.m. 232.038; r.d. 11.5–11.9 (17°C); m.p. 1740–1760°C; b.p. 4780–4800°C. It occurs in monazite sand in Brazil, India, and the USA. The isotopes of thorium have mass numbers from 223 to 234 inclusive; the most stable isotope, thorium–232, has a half-life of 1.39 × 10¹⁰ years. It can be used as a nuclear fuel for breeder reactors as thorium–232 captures slow neutrons to breed uranium–233. Thorium dioxide (thoria, ThO₂) is used on gas mantles and in special refractories. The element was discovered by Jöns Jacob Berzelius (1779–1848) in 1828. Chemistry A grey radioactive metallic element belonging to the actinoids; a.n. 90; r.a.m. 232.038; r.d. 11.5–11.9 (17°C); m.p. 1740–1760°C; b.p. 4780–4800°C. It occurs in monazite sand in Brazil, India, and USA. The isotopes of thorium have mass numbers from 223 to 234 inclusive; the most stable isotope, thorium-232, has a half-life of 1.39×10¹⁰ years. It has an oxidation state of (+4) and its chemistry resembles that of the other actinoids. It can be used as a nuclear fuel for breeder reactors as thorium‐232 captures slow neutrons to breed uranium‐233. Thorium dioxide (thoria, ThO₂) is used on gas mantles and in special refractories. The element was discovered by J. J. Berzelius in 1829. https://www.webelements.com/thorium/ Information from the WebElements site
随便看	Jeans length Jeans mass JEDEC Jefferson, Thomas (1743–1826) Jeffreys of Wem, George Jeffreys, 1st Baron (1645–89) Jeffreys prior Jeffreys, Sir Alec John Jeffreys, Sir Harold Jeffreys, Sir Harold (1891–1989) Jeffreys–Bullen curves Jeffreys–Lindley paradox Jehangir jejunum jellyfish JEM Jemison, Mae Carol (1956– ) Jemmis mno rules jen Jena, Battle of (14 October 1806) Jenkins, Gwilym Meirion (1933–82) Jenkins’s Ear, War of (1739–41) Jenner, Edward Jensen inequality Jensen, Johan Ludwig William Valdemar (1859–1925) Jensen, Johannes Hans Daniel