52
127.60
Te
Tellurium
Identification
CAS Number: 13494-80-9
Discovery Year: 1782
Discoverer: Franz Müller von Reichenstein
Discovery Location: Romania
Properties
Atomic Dimensions
Atomic Radius: 140 pm →
Atomic Radius (Rahm): 242 pm
Covalent Radius: 138 pm →Van der Waals Radius: 206 pm
Metallic Radius: 137 pm
Atomic Volume: 20.5 cm³/mol
Lattice Constant: 4.45 Å
Thermodynamics
Electronic Structure
Electron Config: [Kr] 4d10 5s2 5p4
Block: p
Period: 5 →Group: 16 →Electronegativity: 2.1 →Electron Affinity: 1.9708759999999999 eV →Oxidation States: -2, +4, +6
Abundance & Geochemistry
Crust Abundance: 0.001 mg/kg
Geochemical Class: semi-volatile
Goldschmidt Class: chalcophile
About
Silvery metalloid element of group 16. Eight natural isotopes, nine radioactive isotopes. Used in semiconductors and to a degree in some steels. Chemistry is similar to Sulphur. Discovered in 1782 by Franz Miller.
Isotopes
Te-130 130 34.08%
Te-128 128 31.74%
Te-126 126 18.84%
Te-125 125 7.07%
Te-124 124 4.74%
Te-122 122 2.55%
Te-123 123 0.8900%
Te-120 120 0.0900%
