3D Bohr-model representation of the Silicon atom (symbol Si, atomic number Z=14). Electron shell configuration: 2, 8, 4 electrons.
Scroll to activate 3D
Bohr model · educational
Bohr model of silicon
Silicon (Si) has 14 electrons, spread over 3 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) | 4 |
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
First look at the periodic classification
Reading the table, spotting families (alkali metals, halogens, noble gases). Why some elements share properties.
9 minElectron configuration
Full1s² 2s² 2p⁶ 3s² 3p²
Short[Ne] 3s² 3p²
Valence electrons4
KLMNOPQ shells
K2
L8
M4
Electronegativity
Pauling1.9
Allen1.916
Mulliken (eV)—
Atomic radii
Empirical110 pm
Calculated111 pm
Covalent111 pm
Van der Waals210 pm
Ionic radii (Shannon-Prewitt)
+440 pm
Successive ionisation energies
I₁786.5 kJ/mol
I₂1577.1 kJ/mol
I₃3231.6 kJ/mol
I₄4355.5 kJ/mol
I₅16091 kJ/mol
Electron affinity134.1 kJ/mol
Oxidation states
-4-3-2-1+1+2+3+4
Bold states = most common.
Warm-up
Silicon — 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