(So named (Modern Latin Holmia, Stockholm) by P. T. Cleve, Swedish chemist, its second discoverer, after his native city) A trivalent, silvery chemical element, one of the rare-earth metals.

Symbol: Ho
Atomic number: 67
Atomic weight: 164.93032
Density (at room temperature and pressure): 8.80 g/cc
Melting point: 1,474°C
Boiling point: 2,700°C
Valence: +3
Ground state electron configuration: [Xe]4f116s2