francium
音標['fr?nsi?m] 讀音漢語翻譯
n. 鍅
【化】 鍅
【醫】 鍅(87號元素)
詞型變化:
簡寫符號:Fr英文解釋:
名詞 francium:
- a radioactive element of the alkali-metal group discovered as a disintegration product of actinium同義詞:Fr, atomic number 87
詳細解釋:
fran.ci.um
n.Symbol Fr (名詞)符號 Fr An extremely unstable radioactive element of the alkali metals, produced artificially from actinum or thorium, having approximately 9 isotopes, the most stable of which is Fr 223 with a half-life of 2 minutes. Atomic number 87; valence .See table at element 鍅:從鹼金屬錒或釷中人工提煉出的一種極不穩定的放射線元素,約有9種同位素,其中最穩定的是半衰期為2分鐘的Fr223。原子序數為87;化合價為參見 element
來源:After France 源自 France
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