Periodic Table
78
Pt
195.08
Platinum
Transition MetalConfig exception (5d⁹6s¹); catalysis; cisplatin; inert.
Electronic Configuration
[Xe] 4f¹⁴ 5d⁹ 6s¹or1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 4f¹⁴ 5d⁹ 6s¹
Electron shells
2e⁻n=1
8e⁻n=2
18e⁻n=3
32e⁻n=4
17e⁻n=5
1e⁻n=6
Properties
Atomic number
78
Atomic mass
195.08 u
Category
Transition Metal
Block / Group / Period
d · 10 · 6
Valence electrons
1
Oxidation states
+2, +4
Electronegativity
2.28
Atomic radius
177 pm
Ionization energy
870 kJ/mol
Electron affinity
205 kJ/mol
Melting point
2041 K / 1768 °C
Boiling point
4098 K / 3825 °C
Density
21.46 g/cm³
State at 25 °C
solid
Personal Notes
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