Atomic Element Z = 67 • Lanthanide
Holmium (Ho) — Atomic Data, Electron Shells & Reactions
Holmium (symbol Ho, atomic number 67) has a standard atomic weight of 164.93 u and ground-state configuration [Xe] 4f11 6s2.
Atomic Number (Z)
67
IUPAC Symbol
Ho
Standard Atomic Weight
164.93 g/mol
Period / Group / Block
6 / f-block / f-block
Condensed Electron Config
[Xe] 4f11 6s2
Full Subshell Config
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f11 5s2 5p6 6s2
Principal Shell Occupancy
[2, 8, 18, 29, 8, 2]
Pauling Electronegativity
1.23
First Ionization Energy
581 kJ/mol
Covalent Radius
192 pm
Melting Point
1734 K (1460.85 °C)
Boiling Point
2993 K (2719.85 °C)
Density
8.795 g/cm³
Oxidation States
+3
Ho (Z=67) — Valence shell highlighted in vermilion