hafnium
音標['h?fni?m] 讀音漢語翻譯
n. 鉿
【化】 鉿
【醫】 鈴(72號元素)
詞型變化:
簡寫符號:Hf英文解釋:
名詞 hafnium:
- a grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons同義詞:Hf, atomic number 72
詳細解釋:
haf.ni.um
n.Symbol Hf (名詞)符號 Hf A brilliant, silvery, metallic element separated from ores of zirconium and used in nuclear reactor control rods, as a getter for oxygen and nitrogen, and in the manufacture of tungsten filaments. Atomic number 72; atomic weight 78.49; melting point 2,220=C; boiling point 5,400=C; specific gravity 3.3; valence 4.See table at element 鉿:一種鋯礦中分離出來的亮銀色金屬元素,用於核反應堆的控制棒,可形成氧氣和氮氣的保護膜,還用於鎢絲的製造。原子序數72;原子量78.49;熔點2,220=C;沸點5,400=C;比重3.3;原子價4參見 element
來源:After Hafnia , Medieval Latin name for Copenhagen, Denmark 源自 哈夫尼爾 ,丹麥哥本哈根的中世紀拉丁名
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