Volfram
74
W
Guruh
6
Davr
6
Block
d
Protonlar
Elektronlar
Neytronlar
74
74
110
General Properties
Atom raqami
74
Atom massasi
183,84
Mass Number
184
Turkum
Oʻtish metallar
Ranggi
Gray
Radioaktivlik
Yoʻq
From Swedish, tung sten meaning heavy stone
Crystal Structure
Body Centered Cubic
Tarix
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.
Electrons per shell
2, 8, 18, 32, 12, 2
Elektron konfiguratsiyasi
[Xe] 4f14 5d4 6s2
The chemical symbol, W, comes from the original name of the element, Wolfram
Physical Properties
Phase
Qattiq modda
Zichlik
19,25 g/cm3
Erish harorati
3695,15 K | 3422 °C | 6191,6 °F
Qaynash harorati
5828,15 K | 5555 °C | 10031 °F
Heat of Fusion
35 kJ/mol
Heat of Vaporization
800 kJ/mol
Solishtirma issiqlik sigʻimi
0,132 J/g·K
Abundance in Earth's crust
0,00011%
Abundance in Universe
5×10-8%
CAS Number
7440-33-7
PubChem CID Number
23964
Atomic Properties
Atom radiusi
139 pm
Kovalentlik radiusi
162 pm
Elektrmanfiylik
2,36 (Poling boʻyicha)
Ionization Potential
7,864 eV
Molyar hajm
9,53 cm3/mol
Issiqlik oʻtkazuvchanlik
1,74 W/cm·K
Oksidlanish darajasi
-2, -1, 1, 2, 3, 4, 5, 6
Applications
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
Izotoplar
Barqaror izotoplar
180W, 182W, 183W, 184W, 186WBeqaror izotoplar
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