praseodymium
praseodymium漢語翻譯
【化】 鐠Pr
【醫(yī)】 鐠(59號元素)
praseodymium詞型變化
praseodymium英語解釋
名詞 praseodymium:
- a soft yellowish-white trivalent metallic element of the rare earth group; can be recovered from bastnasite or monazite by an ion-exchange process同義詞:Pr, atomic number 59
praseodymium詳細解釋
pra.se.o.dym.i.um
n.Symbol Pr (名詞)符號 Pr A soft, silvery, malleable, ductile rare-earth element that develops a characteristic green tarnish in air. It occurs naturally with other rare earths in monazite and is used to color glass and ceramics yellow, as a core material for carbon arcs, and in metallic alloys. Atomic number 59; atomic weight 40.907; melting point 935=C; boiling point 3,27=C; specific gravity '.8; valence 3, 4.See table at element 鐠:一種銀色、柔軟、可延展的粘性稀土元素,在空氣中能形成綠色失澤膜,在自然界中它與其它稀土元素一同存在于獨居石中,用于彩色玻璃和陶器黃色顏料,是炭精電弧的核心材料,并用于金屬合金。原子序數(shù)59;原子量40.907;熔點935=C;沸點3,27=C;比重'.8;化合價3,4參見 element
來源:New Latin 現(xiàn)代拉丁語 from Greek prasios [leek-green] from prason [leek] 源自 希臘語 prasios [蔥綠] 源自 prason [蔥] (di)dymium (di)dymium
最新應(yīng)用
- 10紙上部落