DICT.TW Dictionary Taiwan
tan·ta·lum /ˈtæntḷəm/
金屬元素,符號Ta,原子序83
tan·ta·lum /ˈtæntḷəm/ 名詞
鉭
tantalum
鉭
Tan·ta·lum n. Chem. A rare nonmetallic element found in certain minerals, as tantalite, samarskite, and fergusonite, and isolated as a dark powder which becomes steel-gray by burnishing. Symbol Ta. Atomic weight 182.0. Formerly called also tantalium.
◄ ►
tantalum
n : a hard gray lustrous metallic element that is highly
corrosion-resistant; occurs in niobite and fergusonite
and tantalite [syn: Ta, atomic number 73]
tantalum
Symbol: Ta
Atomic number: 73
Atomic weight: 180.948
Heavy blue-grey metallic transition element. Ta-181 is a stable isotope,
and Ta-180 is a radioactive isotope, with a half-life in excess of 10^7
years. Used in surgery as it is unreactive. Forms a passive oxide layer in
air. Identified in 1802 by Ekeberg and isolated in 1820 by Jons J.
Berzelius.