3D Bohr-model representation of the Manganese atom (symbol Mn, atomic number Z=25). Electron shell configuration: 2, 8, 13, 2 electrons.
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Bohr model · educational
Bohr model of manganese
Manganese (Mn) has 25 electrons, spread over 4 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) | 13 |
| N (n = 4) | 2 |
The Bohr model is a teaching picture: electrons do not travel in circular orbits, but the number of electrons per shell is exact.
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11 minElectron configuration
Full1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁵ 4s²
Short[Ar] 3d⁵ 4s²
Valence electrons7
KLMNOPQ shells
K2
L8
M13
N2
Electronegativity
Pauling1.55
Allen1.75
Mulliken (eV)—
Atomic radii
Empirical140 pm
Calculated161 pm
Covalent139 pm
Van der Waals—
Ionic radii (Shannon-Prewitt)
+283 pm
+746 pm
Successive ionisation energies
I₁717.3 kJ/mol
I₂1509 kJ/mol
I₃3248 kJ/mol
I₄4940 kJ/mol
I₅6990 kJ/mol
Electron affinity—
Oxidation states
-3-2-10+1+2+3+4+5+6+7
Bold states = most common.
Warm-up
Manganese — 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