| 单词 | francium |
| 释义 | francium (once / 3939771 pages) n WORD FAMILY francium USAGE EXAMPLESThe team’s proposed name follows suit with other atomic elements like polonium named after Poland, francium after France, and americium after the United States. Time(Jun 09, 2016) It is evident in entries like francium, germanium, scandium, polonium, europium, californium, berkelium and americium. New York Times(Jan 04, 2016) The New York Times Magazine Veronique Greenwood talks about the sacrifice often inherent to scientific discovery, and recounts Marguerite Perey's discovery of Francium. The Verge(Dec 06, 2014) n a radioactive element of the alkali-metal group discovered as a disintegration product of actinium Syn|Hyper Fr, atomic number 87 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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