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
Bohr model of platinum
Platinum (Pt) has 78 electrons, spread over 6 shells. The diagram places them on circles around the nucleus, from the K shell — the closest — outward.
| Shell | Electrons |
|---|---|
| K (n = 1) | 2 |
| L (n = 2) | 8 |
| M (n = 3) | 18 |
| N (n = 4) | 32 |
| O (n = 5) | 17 |
| P (n = 6) | 1 |
The Bohr model is a teaching picture: electrons do not travel in circular orbits, but the number of electrons per shell is exact.
Related lesson
Catalysis
Catalyst, activation energy, energy profile. Homogeneous, heterogeneous, enzymatic catalysis.
11 minElectron configuration
Full1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p⁶ 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.
Warm-up
Platinum — do you remember?
3 questions on this page. The right answer shows every time, and nothing is asked of you to play.
No account · one minute