Element: Antimony (Sb)

Element (Atom) NameAntimony
Physical state at room temperatureSolid
Element ClassificationSemi-metal
Group NamePnictogen/Metalloid
Period Number (Periodic table) 5
Group number (Periodic table)15
Atomic number51
Atomic weight121.760 (Ref: Jlab-ele051, ciaaw-antimony, Nist-51)
121.8 (Ref: Lanl-51)
Atomic Radius206 pm (Van der Waals) (Ref: Lanl-51)
Density6.685 g/cm3 (Ref: Jlab-ele051)
Melting point630.63°C (Ref: Jlab-ele051, Lanl-51)
Boiling point1587°C (Ref: Jlab-ele051)1635 °C (Ref: Lanl-51)
Electron shell configuration1s2 
2s2 2p6 
3s2 3p6 3d10 
4s2 4p6 4d10 
5s2 5p3
Oxidation States+5, +3, -3 (Ref: Jlab-ele051)
5, 4, 3, 2, 1, −1, −2, −3 ​(an amphoteric oxide) (Ref: Lanl-51)
Ionization Energy8.64 eV (Ref: Jlab-ele051)
8.608389 eV (Ref: Nist-51)
Number of Stable Isotopes2
InChIInChI=1S/Sb (Ref: Pubchem-51)


  • Jlab-ele051: https://education.jlab.org/itselemental/ele051.html
  • Lanl-51: https://periodic.lanl.gov/51.shtml
  • ciaaw-antimony: https://www.ciaaw.org/antimony.htm
  • Nist-51: https://physics.nist.gov/cgi-bin/Elements/elInfo.pl?element=51
  • Pubchem-51: https://pubchem.ncbi.nlm.nih.gov/element/51
  • science.co.il: https://www.science.co.il/elements/

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