Pt
Platinum
Z 78 195.084 g/molTransition Metal
Nucleus
78 Protons
117 Neutrons
78 Electrons (10 Valence)
Shell distribution: K2 • L8 • M18 • N32 • O17 • P1 • Q0
Electron Configuration
Energy
7p
6d
5f
7s
6p
5d
4f
6s
5p
4d
5s
4p
3d
4s
3p
3s
2p
2s
1s
[Xe]4f145d96s1
Oxidation States
CommonRare
0
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Radii
Empirical
135 pm1.35 Å
Calculated
177 pm1.77 Å
Covalent
136±5 pm1.36±0.05 Å
Van der Waals
209 pm2.09 Å
IonicPt2+
80 pm0.8 Å
Crystal Structure
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Face-centered cubic
Pearson symbol
cF4
Space group
Fm3m No. 225