Tungsten

Chemical, physical and material properties and data of the chemical element Tungsten.

Content

General data

Atomar properties

Electron configutation

General Information about Tungsten

Regular nameTungstenChemical symbolWOther namesSystematic nameHistorical namesName meaning, originDiscovery (year)OccurencePosition in the PSEGroup membership

Atomar Properties of Tungsten

Atomic number Z74 = number of protonsStandard Atomic Weight183.84 (1)

Electron configuration of Tungsten

1s	2s	2p	3s	3p	3d	4s	4p	4d	4f	5s	5p	5d	5f	6s	6p	6d	6f	7s	7p
2	2	6	2	6	10	2	6	10	14	2	6	4		2

Abbreviated form: [Xe] 4f¹⁴ 5d⁴ 6s² .

Ionization Energies of Tungsten

The following table lists the ionization energies IE (ionization potentials); the IE is the energy required in electron volts (eV) per atom to separate a given electron from an Tungsten atom.

IE1
7.98

Isotopic Data of Tungsten

An overview of the nuclides as well as the isotopic data and properties are listed on the following page: Tungsten isotopes.

Chemistry of Tungsten

Oxidation states+6. +4Electronegativity1.7 (Pauling original)
2.36 (Pauling)
1.47 (Allen)
4.40 eV (Pearson)Electron affinity0.816 26(8) eV
78.76(1) kJ mol^-1

Standard Electrode Potential

E⁰ (V)	Symbol	N_ox	Name Ox. Name Red.	Ox. Red.	e^-
-0.119	W	+ IV 0	Tungsten(IV) dioxide Tungsten	WO₂ (s) + 4 H⁺ ⇄ W (s) + 2 H₂O	+ 4 e^-
-0.090	W	+ VI 0	Tungsten trioxide Tungsten	WO₃ (aq) + 6 H⁺ ⇄ W (s) + 3 H₂O	+ 6 e^-
0.036	W	+ IV + IV	Tungsten(VI) oxide Tungsten(IV) oxide	WO₃ + 2 H⁺ ⇄ WO₂ + H₂O	+ 2 e^-

Material and Physical Properties

Melting point3414 °CEnthalpy of fusion (molar)52.31 kJ mol^-1Boiling point5930 °CEnthalpy of vaporization799.1 kJ mol^-1Density19.25 g cm^-3

External Data, Identifiers

CAS registry number7440-33-7InChI =1S/WInChIKeyWFKWXMTUELFFGS-UHFFFAOYSA-NPubChem ID23964

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Last update: 2022-12-12

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