3D Bohr-model representation of the Yttrium atom (symbol Y, atomic number Z=39). Electron shell configuration: 2, 8, 18, 9, 2 electrons.
Scroll to activate 3D
Bohr model · educational
Bohr model of yttrium
Yttrium (Y) has 39 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) | 9 |
| O (n = 5) | 2 |
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 4d¹ 5s²
Short[Kr] 4d¹ 5s²
Valence electrons3
KLMNOPQ shells
K2
L8
M18
N9
O2
Electronegativity
Pauling1.22
Allen1.12
Mulliken (eV)—
Atomic radii
Empirical180 pm
Calculated212 pm
Covalent190 pm
Van der Waals—
Ionic radii (Shannon-Prewitt)
+390 pm
Successive ionisation energies
I₁600 kJ/mol
I₂1180 kJ/mol
I₃1980 kJ/mol
I₄5847 kJ/mol
I₅7430 kJ/mol
Electron affinity29.6 kJ/mol
Oxidation states
+1+2+3
Bold states = most common.
Warm-up
Yttrium — 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