Tellurium vs Iodine

Side-by-side comparison of Tellurium (Te, element 52) and Iodine (I, element 53) by atomic structure and physical properties.

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PropertyTe Tellurium I Iodine
Atomic number5253
SymbolTeI
NameTelluriumIodine
Categorymetalloidhalogen
Standard Atomic Weight127.6 u126.90447 u
Period55
Group1617
Blockpp
Phase at STPSolidSolid
Electron configuration[Kr]4d105s25p4[Kr]4d105s25p5
Oxidation states[-2, -1, 0, 1, 2, 3, 4, 5, 6][-1, 1, 2, 3, 4, 5, 6, 7]
Electronegativity (Pauling)2.12.66
Electron affinity1.9708 eV3.059 eV
Density6232 kg/m³4930 kg/m³
Melting point449.51 °C113.7 °C
Boiling point987.85 °C184.4 °C
Discovery year17821811

Key Differences

PropertyTe TelluriumI Iodine
Standard Atomic Weight127.6 u ↑ higher126.90447 u ↓ lower
Density6232 kg/m³ ↑ higher4930 kg/m³ ↓ lower
Melting point449.51 °C ↑ higher113.7 °C ↓ lower
Boiling point987.85 °C ↑ higher184.4 °C ↓ lower
Electronegativity (Pauling)2.1 ↓ lower2.66 ↑ higher
Electron affinity1.9708 eV ↓ lower3.059 eV ↑ higher
Group16 17
Categorymetalloid halogen
Electron configuration[Kr]4d105s25p4 [Kr]4d105s25p5
Discovery year1782 1811