General | States | Energies | Oxidation & Electrons |Appearance & Characteristics
Reactions | Other Forms |Radius | Conductivity | Abundance
Encyclopedia Britannica articles


Name Antimony Symbol Sb
atomic number 51 Atomic weight 121.75
Density @ 293 K 6.684 g/cm3 Atomic volume 18.23 cm3/mol
Group Metal, Nitrogen group discovered 1600


state (s, l, g) s
melting point 903.94 K boiling point 1860 K
Heat of fusion 19.870 kJ/mol Heat of vaporization 77.140 kJ/mol
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1st ionization energy 833.7 kJ/mole electronegativity 2.05
2nd ionization energy 1594.9 kJ/mole electron affinity 103 kJ/mole
3rd ionization energy 2441.1 kJ/mole Specific heat 0.21 J/gK
heat atomization 262 kJ/mole atoms

Oxidation & Electrons

Shells 2,8,18,18,5 electron configuration [Kr] 4d10 5s2 5p3
minimum oxidation number -3 maximum oxidation number 5
min. common oxidation no. 0 max. common oxidation no. 5
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Appearance & Characteristics

structure rhombohedral color bluish-white
uses Pb alloy(battery), dyeing toxicity
hardness 3.15 mohs characteristics brittle; 5 forms


reaction with air mild, w/ht, = Sb2Ox x=3-5 reaction with 6M HCl none
reaction with 6M HCl none reaction with 15M HNO3 mild, = Sb2O5
reaction with 6M NaOH none
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Other Forms

number of isotopes 2 hydride(s) SbH3
oxide(s) Sb2O3 Sb2O4 Sb2O5 chloride(s) SbCl3 SbCl5


ionic radius (2- ion) pm ionic radius (1- ion) pm
atomic radius 140 pm ionic radius (1+ ion) pm
ionic radius (2+ ion) pm ionic radius (3+ ion) 90 pm
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thermal conductivity 24.4 J/m-sec-deg electrical conductivity 25.641 1/mohm-cm
polarizability 6.6 A^3


source Stibnite (sulfide) rel. abund. solar system -0.510 log
abundance earth's crust -0.7 log cost, pure 4.5 $/100g
cost, bulk 0.44 $/100g
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World Wide Web presentation of Chemicool Periodic Table is © Copyright 1996-99 by David D. Hsu. Some data were provided by and used with the permission of JCE Software and is owned and copyright by the Division of Chemical Education, Inc. Additional data were provided by Perkin-Elmer through Peter Lykos of IIT. The information may not be redistributed without the permission of David Hsu or JCE Software.