← Back to periodic table
Holmium (Ho)
Atomic number: 67 · Category: lanthanide · Group 3 · Period 6 · Phase: Solid
Holmium is a chemical element with symbol Ho and atomic number 67. Part of the lanthanide series, holmium is a rare earth element. Holmium was discovered by Swedish chemist Per Theodor Cleve.
Atomic mass: 164.930332
Density: 8.79
Melting point: 1734 K
Boiling point: 2873 K
Appearance: silvery white
Source: Wikipedia
Block: f
Molar heat: 27.15
CPK color:#00ff9c
Electronic structure
Electron configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f11
Configuration (semantic): [Xe] 4f11 6s2
Shells: 2, 8, 18, 29, 8, 2
Electronegativity (Pauling): 1.23
Electron affinity: 32.61
Ionization energies: 581, 1140, 2204, 4100
Periodic position
Group: 3
Period: 6
xpos: 13
ypos: 9
Spectral/Bohr images
Image
3D Model