Volframo
74
W
Grupo
6
Perio
6
Bloko
d
Protonoj
Elektronoj
Neŭtronoj
74
74
110
Ĝeneralaj Propraĵoj
Atoma Nombro
74
Atommaso
183,84
Amasa Nombro
184
Kategorio
Transirmetaloj
Koloro
Griza
Radioaktiva
Ne
From Swedish, tung sten meaning heavy stone
Kristala Strukturo
Korpo Centrita Kubo
Historio
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.
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.
Elektronoj per ŝelo
2, 8, 18, 32, 12, 2
Elektrona Agordo
[Xe] 4f14 5d4 6s2
The chemical symbol, W, comes from the original name of the element, Wolfram
Fizikaj Propraĵoj
Fazo
Solido
Denso
19,25 g/cm3
Fandpunkto
3695,15 K | 3422 °C | 6191,6 °F
Bolpunkto
5828,15 K | 5555 °C | 10031 °F
Varmo de Fuzio
35 kJ/mol
Varmo de Vaporiĝo
800 kJ/mol
Specifa Varmo Kapacito
0,132 J/g·K
Krusta Abundo
0,00011%
Universa Abundo
5×10-8%
CAS Nombro
7440-33-7
PubChem Kunmetita Identiga Nombro
23964
Atomaj Propraĵoj
Atoma Radiuso
139 pm
Kovalenta Radiuso
162 pm
Elektronegativeco
2,36 (Pauling-skalo)
Potencialo de jonigo
7,864 eV
Atoma Volumo
9,53 cm3/mol
Termika Kondukto
1,74 W/cm·K
Oksidaj Ŝtatoj
-2, -1, 1, 2, 3, 4, 5, 6
Aplikoj
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.
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.
Tungsten is considered to be of low toxicity
Izotopoj
Stabilaj Izotopoj
180W, 182W, 183W, 184W, 186WMalstabilaj Isotopoj
158W, 159W, 160W, 161W, 162W, 163W, 164W, 165W, 166W, 167W, 168W, 169W, 170W, 171W, 172W, 173W, 174W, 175W, 176W, 177W, 178W, 179W, 181W, 185W, 187W, 188W, 189W, 190W, 191W, 192W