Tungsten

74
W
Kumpulan
6
Kala
6
Blok
d
Proton
Elektron
Neutron
74
74
110
Ciri-Ciri Am
Nombor atom
74
Berat atom
183.84
Nombor jisim
184
Kategori
Logam peralihan
Warna
Kelabu
Radioaktif
Tidak
From Swedish, tung sten meaning heavy stone
Struktur hablur
Pusat Badan Kubik
Sejarah
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.
Bilangan elektron per petala
2, 8, 18, 32, 12, 2
Konfigurasi elektron
[Xe] 4f14 5d4 6s2
W
The chemical symbol, W, comes from the original name of the element, Wolfram
Ciri-Ciri Fizikal
Fasa
Pepejal
Ketumpatan
19.25 g/cm3
Takat lebur
3695.15 K | 3422 °C | 6191.6 °F
Takat didih
5828.15 K | 5555 °C | 10031 °F
Haba pelakuran
35 kJ/mol
Haba pengewapan
800 kJ/mol
Muatan haba molar
0.132 J/g·K
Banyak pada kerak bumi
0.00011%
Banyak pada alam semesta
5×10-8%
Tungsten
Kredit imej: Images-of-elements
Tungsten rod with oxidized surface
Nombor CAS
7440-33-7
PubChem CID Number
23964
Ciri-Ciri Atom
Jejari atom
139 pm
Jejari kovalen
162 pm
Keelektronegatifan
2.36 (Skala Pauling)
Kebolehan mengion
7.864 eV
Isipadu atom
9.53 cm3/mol
Daya pengaliran terma
1.74 W/cm·K
Keadaan pengoksidaan
-2, -1, 1, 2, 3, 4, 5, 6
Aplikasi
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 is considered to be of low toxicity
Isotop
Isotop stabil
180W, 182W, 183W, 184W, 186W
Isotop tidak stabil
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