Volfram
74
W
Guruh
6
Davr
6
Blok
d
Protonlar
Elektronlar
Neytronlar
74
74
110
Umumiy xususiyatlar
Atom raqami
74
Atom massasi
183,84
Mass raqami
184
Turkum
Oʻtish metallar
Ranggi
Kulrang
Radioaktivlik
Yoʻq
From Swedish, tung sten meaning heavy stone
Kristall tuzilma
Tana markazli kubik
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.
Qobiqdagi elektronlar soni
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
Jismoniy xususiyatlar
Faza
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
Eritish issiqligi
35 kJ/mol
Bugʻlanish issiqligi
800 kJ/mol
Solishtirma issiqlik sigʻimi
0,132 J/g·K
Yer po‘stidagi miqdori
0,00011%
Olamdagi miqdori
5×10-8%
CAS raqami
7440-33-7
PubChem CID raqami
23964
Atom xususiyatlari
Atom radiusi
139 pm
Kovalentlik radiusi
162 pm
Elektrmanfiylik
2,36 (Poling boʻyicha)
Ionlashish potensiali
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
Qo‘llanilish sohalari
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