Sb
Antimony
Z 51 121.76 g/molMetalloid
Nucleus
51 Protons
71 Neutrons
51 Electrons (5 Valence)
Shell distribution: K2 • L8 • M18 • N18 • O5 • P0 • Q0
Electron Configuration
Energy
7p
6d
5f
7s
6p
5d
4f
6s
5p
4d
5s
4p
3d
4s
3p
3s
2p
2s
1s
[Kr]4d105s25p3
Oxidation States
CommonRare
0
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Radii
Empirical
145 pm1.45 Å
Calculated
133 pm1.33 Å
Covalent
139±5 pm1.39±0.05 Å
Van der Waals
206 pm2.06 Å
IonicSb3-
245 pm2.45 Å
Crystal Structure
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RhombohedralStandard state
Pearson symbol
hR2
Space group
R3m No. 166
Density
6.697 g/cm³