Template:Infobox tellurium

Tellurium, ₅₂Te
	Template:Infobox element/symbol-to-top-image-caption
General properties
Pronunciation	Template:Infobox element/pronunciation
Appearance	silvery lustrous gray (crystalline),; brown-black powder (amorphous)
Standard atomic weight (Ar, standard)	Template:Infobox element/standard atomic weight
Mass number	Template:Infobox element/symbol-to-most-stable-isotope (most stable isotope)
Tellurium in the periodic table
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Atomic number (Z)	52
Group	Template:Infobox element/group
Period	period 5
Block	p-block
Element category	Template:Infobox element/category format
Electron configuration	[Kr] 4d10 5s2 5p4
Electrons per shell	2, 8, 18, 18, 6
Physical properties
Phase at STP	solid
Melting point	722.66 K (449.51 °C, 841.12 °F)
Boiling point	1261 K (988 °C, 1810 °F)
Density (near r.t.)	6.24 g/cm3
when liquid (at m.p.)	5.70 g/cm3
Heat of fusion	17.49 kJ/mol
[[Enthalpy of vaporization\|Heat of Template:Engvar]]	114.1 kJ/mol
Molar heat capacity	25.73 J/(mol·K)
	[[Vapor pressure\|Template:Engvar pressure]] Template:Infobox element/vapor pressure table
Atomic properties
Oxidation states	Template:Infobox element/symbol-to-oxidation-state
Electronegativity	Pauling scale: 2.1
[[Ionization energy\|Template:Engvar energies]]	1st: 869.3 kJ/mol ; 2nd: 1790 kJ/mol ; 3rd: 2698 kJ/mol ; ;
Atomic radius	empirical: 140 pm
Covalent radius	138±4 pm
Van der Waals radius	206 pm
	Template:Infobox element/spectral lines
Other properties
Crystal structure	Template:Infobox element/crystal structure Template:Infobox element/crystal structure
Speed of sound thin rod	2610 m/s (at 20 °C)
Thermal expansion	18 µm/(m·K) (at r.t.)
Thermal conductivity	1.97–3.38 W/(m·K)
Magnetic ordering	diamagnetic
Magnetic susceptibility	−39.5·10−6 cm3/mol (298 K)
Young's modulus	43 GPa
Shear modulus	16 GPa
Bulk modulus	65 GPa
Mohs hardness	2.25
Brinell hardness	180–270 MPa
CAS Number	13494-80-9
History
Naming	after Roman Tellus, deity of the Earth
Discovery	Franz-Joseph Müller von Reichenstein (1782)
First isolation	Martin Heinrich Klaproth
Main isotopes of tellurium
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Template:Infobox element/element navigation Template:Template reference list Expression error: Unrecognized word "template".

↑ Cverna, Fran (2002). "Ch. 2 Thermal Expansion". ASM Ready Reference: Thermal properties of metals (PDF). ASM International. ISBN 978-0-87170-768-0.
↑ Lide, D. R., ed. (2005). "Magnetic susceptibility of the elements and inorganic compounds". CRC Handbook of Chemistry and Physics (PDF) (86th ed.). Boca Raton (FL): CRC Press. ISBN 0-8493-0486-5.
↑ Weast, Robert (1984). CRC, Handbook of Chemistry and Physics. Boca Raton, Florida: Chemical Rubber Company Publishing. pp. E110. ISBN 0-8493-0464-4.

[1] Cverna, Fran (2002). "Ch. 2 Thermal Expansion". ASM Ready Reference: Thermal properties of metals (PDF). ASM International. ISBN 978-0-87170-768-0.

[2] Lide, D. R., ed. (2005). "Magnetic susceptibility of the elements and inorganic compounds". CRC Handbook of Chemistry and Physics (PDF) (86th ed.). Boca Raton (FL): CRC Press. ISBN 0-8493-0486-5.

[3] Weast, Robert (1984). CRC, Handbook of Chemistry and Physics. Boca Raton, Florida: Chemical Rubber Company Publishing. pp. E110. ISBN 0-8493-0464-4.

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