tungsten

| Introduction | History | Other Periodic Tables | Back |

Symbol:

W

Atomic Number:

74

Relative Atomic Mass:

183.84 g mol^-1

Natural Abundance in Lithosphere, hydrosphere and atmosphere:

6 x 10^-3% (mass fraction)

Electron Configuration:

[Xe]4f¹⁴5d⁴6s²

Oxidation States:

VI, V, IV, III, II, 0

Atomic Radius:

137pm

Covalent Radius:

130pm

Ionic Radius:

60pm (for +6 oxidation state)

66pm (for +4 oxidation state)

Melting Point:

3410°C

Density:

19.26 g cm^-3 (at 20°C)

First Ionisation Energy:

7.98 eV

Reduction Potential:

-0.09V

for WO₂ + 4H⁺ + 4e^- a W_(s) + 2H₂O

Electronegativity (Allred and Rochow):

1.4

Number of Natural Isotopes:

5

Mass Number of the Most Abundant Isotopes:

182 g mol^-1 a 26.5% abundance

184 g mol^-1 a 30.6% abundance

186 g mol^-1 a 28.4% abundance