Tellurium

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

Contents

General Information about Tellurium

Regular nameTelluriumChemical symbolTeOther namesHistorical namesName meaning, originDiscovery (year)OccurencePosition in the PSEGroup membership

Atomar Properties of Tellurium

Atomic number Z52 = number of protonsStandard Atomic Weight127.60 (3)

Electron configuration of Tellurium

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		2	4

Shorthand electron configuration of Tellurium: [Kr] 4d¹⁰ 5s² 5p⁴ .

Ionization Energies of Tellurium

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 Tellurium atom.

IE1	IE2	IE3	IE4	IE5	IE6	IE7
9.0096	18.6	27.96	37.41	58.75	70.7	137

Isotopic Data of Tellurium

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

Chemistry of Tellurium

Oxidation states-2. +2. +4. +6Electronegativity2.1 (Pauling original)
2.10 (Pauling)
2.158 (Allen)
2.2 (Mulliken)
2.34 (Sanderson)
2.01 (Allred-Rochow)
5.3250 eV (Gosh Gupta)
5.49 eV (Pearson)Electron affinity1.970 875(7) eV
190.161(1) kJ mol^-1

Standard Electrode Potential

E⁰ (V)	Symbol	N_ox	Name Ox. Name Red.	Ox. Red.	e^-
-1.143	Te	0 - II	Tellurium Telluride Dianion	Te (s) ⇄ Te^2-	+ 2 e^-
1.02	Te	+ VI + IV	Telluric acid Tellurium dioxide	H6TeO6 (aq) + 2 H⁺ ⇄ TeO2 (s) + 4 H₂O	+ 2 e^-

Material and Physical Properties

Melting point449.51 °CEnthalpy of fusion (molar)17.49 kJ mol^-1Boiling point988 °CEnthalpy of vaporization50.63 kJ mol^-1Density6.24 g cm^-3

External Data, Identifiers

CAS registry number13494-80-9InChI =1S/TeInChIKeyPORWMNRCUJJQNO-UHFFFAOYSA-NPubChem ID6327182

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Last update: 2022-12-12

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