Antimony vs Tellurium

Side-by-side comparison of Antimony (Sb, element 51) and Tellurium (Te, element 52) by atomic structure and physical properties.

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PropertySb Antimony Te Tellurium
Atomic number5152
SymbolSbTe
NameAntimonyTellurium
Categorymetalloidmetalloid
Standard Atomic Weight121.76 u127.6 u
Period55
Group1516
Blockpp
Phase at STPSolidSolid
Electron configuration[Kr]4d105s25p3[Kr]4d105s25p4
Oxidation states[-3, -2, -1, 0, 1, 2, 3, 4, 5][-2, -1, 0, 1, 2, 3, 4, 5, 6]
Electronegativity (Pauling)2.052.1
Electron affinity1.047401 eV1.9708 eV
Density6685 kg/m³6232 kg/m³
Melting point630.63 °C449.51 °C
Boiling point1586.85 °C987.85 °C
Discovery year17071782

Key Differences

PropertySb AntimonyTe Tellurium
Standard Atomic Weight121.76 u ↓ lower127.6 u ↑ higher
Density6685 kg/m³ ↑ higher6232 kg/m³ ↓ lower
Melting point630.63 °C ↑ higher449.51 °C ↓ lower
Boiling point1586.85 °C ↑ higher987.85 °C ↓ lower
Electronegativity (Pauling)2.05 ↓ lower2.1 ↑ higher
Electron affinity1.047401 eV ↓ lower1.9708 eV ↑ higher
Group15 16
Electron configuration[Kr]4d105s25p3 [Kr]4d105s25p4
Discovery year1707 1782