| 单词 | neptunium |
| 释义 | neptunium (once / 1181932 pages) n WORD FAMILY neptunium USAGE EXAMPLESBut in Oak Ridge right now they’re bombarding neptunium to make plutonium. Scientific American(Sep 10, 2015) The neptunium is then sent to Oak Ridge, the once-secret city where uranium was enriched for the first nuclear bombs during the Second World War. Nature(Nov 24, 2014) Scientists have been creating new elements since 1940, when neptunium and plutonium were first forged at the University of California, Berkeley. Wall Street Journal(Jun 08, 2011) n a radioactive transuranic metallic element; found in trace amounts in uranium ores; a by-product of the production of plutonium Syn|Hyper Np, atomic number 93 metal, metallic element any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc. |
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