3D Bohr-model representation of the Lithium atom (symbol Li, atomic number Z=3). Electron shell configuration: 2, 1 electrons.
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Bohr model · educational
Bohr model of lithium
Lithium (Li) has 3 electrons, spread over 2 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) | 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
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 2s¹
Short[He] 2s¹
Valence electrons1
KLMNOPQ shells
K2
L1
Electronegativity
Pauling0.98
Allen0.912
Mulliken (eV)—
Atomic radii
Empirical145 pm
Calculated167 pm
Covalent128 pm
Van der Waals182 pm
Ionic radii (Shannon-Prewitt)
+176 pm
Successive ionisation energies
I₁520.2 kJ/mol
I₂7298.1 kJ/mol
I₃11815 kJ/mol
Electron affinity59.6 kJ/mol
Oxidation states
+1
Bold states = most common.
Warm-up
Lithium — 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