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Platinum
Block dPeriod 6Group 10solid at 20 °C
Configuration :[Xe] 4f¹⁴ 5d⁹ 6s¹
Atomic mass :195.084 u
French :Platine
3D Bohr-model representation of the Platinum atom (symbol Pt, atomic number Z=78). Electron shell configuration: 2, 8, 18, 32, 17, 1 electrons.
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Bohr model · educational
Electron configuration
Full[Xe] 4f¹⁴ 5d⁹ 6s¹
Short[Xe] 4f¹⁴ 5d⁹ 6s¹
Valence electrons10
KLMNOPQ shells
K2
L8
M18
N32
O17
P1
Electronegativity
Pauling2.28
Allen—
Mulliken (eV)—
Atomic radii
Empirical135 pm
Calculated177 pm
Covalent136 pm
Van der Waals175 pm
Ionic radii (Shannon-Prewitt)
+462.5 pm
Successive ionisation energies
I₁870 kJ/mol
I₂1791 kJ/mol
Electron affinity205.3 kJ/mol
Oxidation states
-3-2-10+1+2+3+4+5+6
Bold states = most common.