3D Bohr-model representation of the Tellurium atom (symbol Te, atomic number Z=52). Electron shell configuration: 2, 8, 18, 18, 6 electrons.
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Bohr model · educational
Bohr model of tellurium
Tellurium (Te) has 52 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) | 18 |
| O (n = 5) | 6 |
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 4d¹⁰ 5s² 5p⁴
Short[Kr] 4d¹⁰ 5s² 5p⁴
Valence electrons6
KLMNOPQ shells
K2
L8
M18
N18
O6
Electronegativity
Pauling2.1
Allen2.158
Mulliken (eV)—
Atomic radii
Empirical140 pm
Calculated123 pm
Covalent138 pm
Van der Waals206 pm
Ionic radii (Shannon-Prewitt)
-2221 pm
Successive ionisation energies
I₁869.3 kJ/mol
I₂1790 kJ/mol
I₃2698 kJ/mol
I₄3610 kJ/mol
I₅5668 kJ/mol
Electron affinity190.2 kJ/mol
Oxidation states
-2-1+1+2+3+4+5+6
Bold states = most common.
Warm-up
Tellurium — do you remember?
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