Stable isotope Tungsten (W)

Isotope Z(p) N(n) Atomic Mass Natural Abundance Enrichment Level Chemical Form
W-180 74 106 179.946706 0.12% >91.00% Metal
W-180 74 106 179.946706 0.12% >91.00% Oxide
W-182 74 108 181.948205 26.50% 91.50-99.10% Metal
W-182 74 108 181.948205 26.50% 91.50-99.10% Oxide
W-183 74 109 182.950224 14.31% >99.00% Metal
W-183 74 109 182.950224 14.31% >98.00% Oxide
W-184 74 110 183.950932 30.64% 95.00-99.10% Metal
W-184 74 110 183.950932 30.64% 95.00-99.10% Oxide
W-186 74 112 185.954362 28.43% 99.79-99.90% Metal
W-186 74 112 185.954362 28.43% 99.79-99.90% Oxide

Properties of Tungsten

Name Tungsten
Symbol W
Atomic number 74
Atomic weight 183.85
Standard state Solid at 298 ºK
CAS Registry ID 7440-33-7
Group in periodic table 6
Group name None
Period in periodic table 6
Block in periodic table d-block
Color Grayish white, lustrous
Classification Metallic
Melting point 3422 °C
Boiling point 5900 °C
Vaporization point 5555 °C
Thermal conductivity 173 W/(m·K) at 298.2 °K
Electrical resistivity 5.65 µΩ·cm at 27 °C
Electronegativity 1.7
Specific heat 0.13 kJ/kg K
Heat of vaporization 800 kJ·mol-1
Heat of fusion 35 kJ·mol-1
Density of liquid 17.6 g/cm3
Density of solid 19.3 g/cm3
Electron configuration [Xe]4f145d46s2
Atomic radius 1.39 Å
Ionic radius W4+: 0.66 Å and W5+: 0.62 Å (coordination number 6); W6+: 0.42 Å (coordination number 4)
Oxidation states 0, +2, +3, +4, +5, +6
Most stable oxidation state +6