Properties

CAS Number7440-29-1
PubChem CID23960
Atomic Radius179
Atomic Volume19.9
Atomic Weight232.038
Blockf
Boiling Point4,788
Bulk Modulus
CategoryActinides
Crystal StructureFace Centered Cubic
ColorSilver
Covalent Radius206
Density11.7
Electrical Resistivity
Electron Configuration[Rn] 6d2 7s2
Electrons per shell2, 8, 18, 32, 18, 10, 2
Electronegativity1.3
Electrons90
Groupna
Heat of Fusion16
Heat of Vaporization530
Ionization Potential6.307
Magnetic Ordering
Magnetic Susceptibility
Mass232.038
Mass Number90
Melting Point1,842
NameThorium
Neutrons142
Atomic Number232
Oxidation States2, 3, 4
Period7
PhaseSolid
Poisson Ratio
Protons90
Shear Modulus
Specific Heat Capacity0.113
SymbolTh
Thermal Conductivity0.54
Van der Waals radius
Young's Modulus
Abundance
Abundance in Earth's crust0.0006%
Abundance in Universe4×10-8%
Th Thorium 90 232.0381 7 f 90 1750.0 4790.0 [Rn] 6d2 7s2 2 8 18 32 18 10 2 11.7 0.0006% Silver Cubic: Face centered 1.3 {"1":"587","2":"1110","3":"1930","4":"2780"} 587 4 1.8 19.9 15.65 543.92 0.113 54.0 1 1.406×101010y AlphaEmission Solid, Conductor, Actinide, Radioactive, Natural THOR-i-em Heavy, gray, soft, malleable, ductile, radioactive metal. Used in making strong alloys. Also in ultraviolet photoelectric cells. It is a common ingredient in high-quality lenses. Bombarded with neutrons make uranium-233, a nuclear fuel. Found in various minerals like monazite and thorite. KQ64Jm3dmSs Thorium
Torbern Bergman obtained from scheelite an oxide of a new element in 1781.

In 1783, José and Fausto Elhuyar found an acid made from wolframite that was identical to tungstic acid.

Later that year, in Spain, the brothers succeeded in isolating tungsten by reduction of this acid with charcoal, and they are credited with the discovery of the element. From Swedish, tung sten meaning heavy stone 90 1829 Jöns Berzelius Sweden Named after "Thor", the mythological Scandinavian god of war

Isotopes of Tungsten

Standard Atomic Weight

232.0377(4)

Stable Isotopes

232Th

Unstable Isotopes

209Th 210Th 211Th 212Th 213Th 214Th 215Th 216Th 217Th 218Th 219Th 220Th 221Th 222Th 223Th 224Th 225Th 226Th 227Th 228Th 229Th 230Th 231Th 233Th 234Th 235Th 236Th 237Th 238Th

Tungsten is considered to be of low toxicity
The chemical symbol, W, comes from the original name of the element, Wolfram
Tungsten and its alloys are widely used for filaments in electric bulbs and electronic tubes.

Tungsten carbide is of great importance to the metal-working, mining, and petroleum industries.

Tungsten oxides are used in ceramic glazes and calcium/magnesium tungstates are used widely in fluorescent lighting.