W

Tungsten

Identification

CAS Number: 7440-33-7

Discovery Year: 1783

Discoverer: Fausto and Juan José de Elhuyar

Discovery Location: Spain

Properties

Atomic Mass: 183.84 →Density: 19.3 g/cm³ →

Crust Abundance: 1.25 mg/kg

Crystal Structure: BCC

Atomic Dimensions

Atomic Radius: 135 pm →

Atomic Radius (Rahm): 252.99999999999997 pm

Covalent Radius: 162 pm →

Van der Waals Radius: 218.00000000000003 pm

Metallic Radius: 130 pm

Atomic Volume: 9.53 cm³/mol

Lattice Constant: 3.16 Å

Thermodynamics

Melting Point: 3680 K →Boiling Point: 5930 K →Specific Heat: 0.133 J/(g·K) →Thermal Conductivity: 173 W/(m·K) →Heat of Fusion: 35 kJ/mol →Heat of Vaporization: 824 kJ/mol →

Heat of Formation: 851 kJ/mol

Electronic Structure

Electron Config: [Xe] 4f14 5d4 6s2

Block: d

Period: 6 →Group: 6 →Electronegativity: 1.7 →Electron Affinity: 0.81626 eV →

Oxidation States: 0, +2, +3, +4, +5, +6

Abundance & Geochemistry

Crust Abundance: 1.25 mg/kg

Sea Abundance: 0.0001 mg/L

Goldschmidt Class: litophile

About

White or grey metallic transition element,formerly called Wolfram. Forms a protective oxide in air and can be oxidized at high temperature. First isolated by Jose and Fausto de Elhuyer in 1783.

Isotopes

W-184 184 30.64%

W-186 186 28.43%

W-182 182 26.50%

W-183 183 14.31%

W-180 180 0.1200%