Tungsten

Symbol 符号

W

Atomic number 原子序数

74

Atomic mass 原子质量	183.85		Thermal conductivity 热导率	1.74
Atomic radius 原子半径	2.02		Covalent radius 共价半径	1.30
Density 密度	19.3		Atomic volume 原子体积	9.53
Melting point 熔点	3680		Oxidation states 氧化态	6,5,4,3,2
Boiling point 沸点	5933		Stable isotopes 稳定同位素	5
Heat of vapor. 汽化热	824		Electronegativity 电负性	2.36
Heat of fusion 熔化热	35.4		First ionization 第一电离能	7.98
Specific heat 比热容	...		Electrical conduct. 电导率	18

Electron configuration 电子排布

Tungsten

Tungsten is a strong, heavy metal with an extremely high melting point (3370°C). It is used for the filaments of light bulbs, the electric contacts in spark plugs, and as electron targets in x-ray tubes.

Alloyed with steel (tungsten steel) it retains its hardness even when hot, making it valuable for high speed cutting tools. Tungsten carbide (WC) is used for the cutting edges of high speed tools.

Tungsten is also called wolfram, the origin of the chemical symbol (W).

Tungsten-containing oxide minerals are ferberite, scheelite and Hubnerite. An oxide of tungsten with lead is stolzite. An oxide of tungsten with iron and manganese is Wolframite.

Tungsten Nuclear Data