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Tellurium (Te)

From Wikipedia, the free encyclopediaTellurium is a chemical element with symbol Te and atomic number 52. It is a brittle, mildly toxic, rare, silver-white metalloid. Tellurium is chemically related to selenium and sulfur.

Tellurium in the periodic table

SymbolTe
Atomic number52
Group16
Period5
Blockp
Element categoryMetalloid

Physical properties

Phase at STPSolid
Density6.24 g/cm3
Atomic weight127.603 u
Melting point722.66 K
449.51 °C
841.118 °F
Boiling point1261 K
987.85 °C
1810.13 °F

Atomic properties

Electronegativity (Pauling Scale)2.1
Electron affinity190.161 kJ/mol
Oxidation states−2, −1, +1, +2, +3, +4, +5, +6
(a mildly acidic oxide)
Ionization energies
1869.3 kJ/mol
2 1790 kJ/mol
3 2698 kJ/mol
4 3610 kJ/mol
5 5668 kJ/mol
6 6820 kJ/mol
7 13200 kJ/mol

Electron configuration

Elektronkonfiguration (shorthand)[Kr] 4d10 5s2 5p4
Electron configuration1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p4
Electrons per shell2, 8, 18, 18, 6

History

Discovered1782
Discovered byFranz-Joseph Müller von Reichenstein
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