To share this content with an AI assistant
67Ho164.930
Holmium
LanthanidesBlock fPeriod 6solid at 20 °C
- Configuration :
- [Xe] 4f¹¹ 6s²
- Atomic mass :
- 164.930328 u
3D Bohr-model representation of the Holmium atom (symbol Ho, atomic number Z=67). Electron shell configuration: 2, 8, 18, 29, 8, 2 electrons.
Scroll to activate 3D
Bohr model · educational
Electron configuration
Full1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p⁶ 4f¹¹ 6s²
Short[Xe] 4f¹¹ 6s²
Valence electrons3
KLMNOPQ shells
K2
L8
M18
N29
O8
P2
Electronegativity
Pauling1.23
Allen—
Mulliken (eV)—
Atomic radii
Empirical175 pm
Calculated226 pm
Covalent192 pm
Van der Waals—
Ionic radii (Shannon-Prewitt)
+390.1 pm
Successive ionisation energies
I₁581 kJ/mol
I₂1140 kJ/mol
I₃2204 kJ/mol
I₄4100 kJ/mol
Electron affinity—
Oxidation states
+1+2+3
Bold states = most common.