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74
W
183.85
Tungsten |
Appearance & Characteristics | Reactions |
Other Forms Radius | Conductivity | Abundance
General:
| Name: Tungsten | Symbol: W |
| Group: Trans. Met. | Atomic weight: 183.85 |
| Density @ 293 K: 19.3 g/cm3 | Atomic volume: 9.53 cm3/mol |
| Group: Trans. Met. | Discovered: 1783 |
States
| State (s, l, g): solid | |
| Melting point: 3683.2 K | Boiling point: 5773 K |
| Heat of fusion: 35.40 kJ/mol | Heat of vaporization: 824.0 kJ/mol |
Energies
| 1st ionization energy: 770 kJ/mole | |
| Electronegativity: 2.36 | 2nd ionization energy: kJ/mole |
| Electron affinity: 78.6 kJ/mole | 3rd ionization energy: kJ/mole |
| Specific heat: 0.13 J/gK | Heat atomization: 849 kJ/mole atoms |
Oxidation & Electrons
| Shells: 2,8,18,32,12,2 | Electron configuration: [Xe] 4f14 5d4 6s2 |
| Minimum oxidation number: -2 | Maximum oxidation number: 6 |
| Min. common oxidation no.: 0 | Max. common oxidation no.: 6 |
Appearance & Characteristics
| Structure: bcc: body-centered cubic | Color: bluish-gray |
| Uses: WC drill bits, bulb wire | Toxicity: |
| Hardness: mohs | Characteristics: highest melting metal |
Reactions
| Reaction with air: none, w/ht => WO3 | |
| Reaction with 6 M HCl: none | Reaction with 6 M HCl: none |
| Reaction with 15 M HNO3: | Reaction with 6 M NaOH: |
Other Forms
| Number of isotopes: 5 | Hydride(s): |
| Oxide(s): WO2 WO3 | Chloride(s): WClx [x=2-6] |
Radius
| Ionic radius (2- ion): pm | Ionic radius (1- ion): pm |
| Atomic radius: 139 pm | Ionic radius (1+ ion): pm |
| Ionic radius (2+ ion): pm | Ionic radius (3+ ion): pm |
Conductivity
| Thermal conductivity: 173 J/m-sec-deg | |
| Electrical conductivity: 176.991 1/mohm-cm | Polarizability: 11.1 A^3 |
Abundance
| Source: Scheelite,wolframite(oxide) | |
| Rel. abund. solar system: -0.876 log | Abundance earth's crust: 0.2 log |
| cost, pure: 11 $/100g | cost, bulk: $/100g |
