Re
Rhenium
Z 75 186.207 g/molTransition Metal
Nucleus
75 Protons
111 Neutrons
75 Electrons (7 Valence)
Shell distribution: K2 • L8 • M18 • N32 • O13 • P2 • Q0
Electron Configuration
Energy
7p
6d
5f
7s
6p
5d
4f
6s
5p
4d
5s
4p
3d
4s
3p
3s
2p
2s
1s
[Xe]4f145d56s2
Oxidation States
CommonRare
0
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Radii
Empirical
135 pm1.35 Å
Calculated
188 pm1.88 Å
Covalent
151±7 pm1.51±0.07 Å
Van der Waals
217 pm2.17 Å
IonicRe4+
63 pm0.63 Å
Crystal Structure
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Hexagonal close-packed
Pearson symbol
hP2
Space group
P63/mmc No. 194