色咪咪网站,艳妇荡乳欲伦1,西班牙燃烧的身体,国产hdxxx天美传媒女职员

Physical Properties of Tungsten

These are some of the physical properties of tungsten:

Atomic Atomic Mass: 183.85 Successive Ionization Energies:
Electronegativity: W -? W + : 770 kJ mol-1
Pauling: 2.36 W+1 -? W+2 : (1700) kJ mol-1
Allred: 1.4 W+2 -? W+3 : (2300) kJ mol-1
Absolute: 4.4 eV W+3 -? W+4 : (3400) kJ mol-1
Electron Affinity: 78.6 kJ mol-1 W+4 -? W+5 : (4600) kJ mol-1
Polarizability: 11.1 ?3 W+5 -? W+6 : (5900) kJ mol-1
Effective Nuclear Charge: Common Ions
Slater: 4.35  
Clementi: 9.85  
Froese Fischer: 14.22  
Radius:  
W 4 +: 68 pm  
W 6 +: 62 pm  
Atomic: 137 pm  
Covalent: 130 pm  

The metal is obtained commercially be recucing tungsten oxide with hydrogen or carbon. Pure tungsten is a stelel-gray to tin-white metal. Very pure tungsten can be cut with a hacksaw, and can be forged, spun, drawn, and extruded. The impure metal is brittle and can be worked only with difficulty. Tungsten has the highest melting point of all metals, and at temperatures over 1650C has the highest tensile strength. The metal oxidizes in air and must be protected at elevated temperatures.It has excellent corrosion resistance and is attacked only slightly by most mineral acids.

主站蜘蛛池模板: 龙海市| 北海市| 宜良县| 句容市| 上饶市| 平度市| 高密市| 开化县| 吉木乃县| 万盛区| 玉林市| 措勤县| 慈溪市| 永昌县| 万全县| 南木林县| 乌拉特中旗| 历史| 龙里县| 广河县| 漠河县| 宣城市| 虹口区| 土默特左旗| 全州县| 邹城市| 永川市| 乐陵市| 晋城| 中西区| 曲阜市| 广昌县| 莫力| 阿瓦提县| 遂宁市| 扶风县| 女性| 南溪县| 宁海县| 乡城县| 徐汇区|