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Tungsten

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


Contents


Tungsten

 

General Information about Tungsten

Regular nameTungstenChemical symbolWOther namesHistorical 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

1s2s2p3s3p3d4s4p4d4f5s5p5d5f6s6p6d6f7s7p
22626102610142642

Shorthand electron configuration of Tungsten: [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 volt (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)SymbolNoxName Ox.
Name Red.
Ox.
Red.
e-
-0.119W+ IV
0
Tungsten(IV) dioxide
Tungsten
WO2 (s) + 4 H+
⇄ W (s) + 2 H2O
+ 4 e-
-0.090W+ VI
0
Tungsten trioxide
Tungsten
WO3 (aq) + 6 H+
⇄ W (s) + 3 H2O
+ 6 e-
0.036W+ 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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isotopes

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Last update: 2022-12-12


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