3D Bohr-model representation of the Molybdenum atom (symbol Mo, atomic number Z=42). Electron shell configuration: 2, 8, 18, 13, 1 electrons.
Scroll to activate 3D
Bohr model · educational
Bohr model of molybdenum
Molybdenum (Mo) has 42 electrons, spread over 5 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) | 13 |
| O (n = 5) | 1 |
The Bohr model is a teaching picture: electrons do not travel in circular orbits, but the number of electrons per shell is exact.
Electron configuration
Full1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d⁵ 5s¹
Short[Kr] 4d⁵ 5s¹
Valence electrons6
KLMNOPQ shells
K2
L8
M18
N13
O1
Electronegativity
Pauling2.16
Allen1.47
Mulliken (eV)—
Atomic radii
Empirical145 pm
Calculated190 pm
Covalent154 pm
Van der Waals—
Ionic radii (Shannon-Prewitt)
+659 pm
Successive ionisation energies
I₁684.3 kJ/mol
I₂1560 kJ/mol
I₃2618 kJ/mol
I₄4480 kJ/mol
I₅5257 kJ/mol
Electron affinity71.9 kJ/mol
Oxidation states
-4-2-10+1+2+3+4+5+6
Bold states = most common.
Warm-up
Molybdenum — 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