I
Iodine
Z 53 126.904 g/molHalogen
Nucleus
53 Protons
74 Neutrons
53 Electrons (7 Valence)
Shell distribution: K2 • L8 • M18 • N18 • O7 • 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]4d105s25p5
Oxidation States
CommonRare
0
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Radii
Empirical
140 pm1.4 Å
Calculated
115 pm1.15 Å
Covalent
139±3 pm1.39±0.03 Å
Van der Waals
198 pm1.98 Å
IonicI-
220 pm2.2 Å
Crystal Structure
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Orthorhombic
Pearson symbol
oS8
Space group
Cmce No. 64