67 Ho 164.930332

Holmium

LANTHANIDE

Phase: Solid

Discovered: Marc Delafontaine

Block: F

Summary

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.

Appearance: silvery white

Source: Wikipedia

Physical Properties

Atomic Mass 164.930332 u

Density 8.79 g/cm³

Melting Point 1734 K

Boiling Point 2873 K

Molar Heat 27.15 J/(mol·K)

Electron Affinity 32.61 kJ/mol

Ionization Energies

1^st: 581 kJ/mol

2^nd: 1140 kJ/mol

3^rd: 2204 kJ/mol

4^th: 4100 kJ/mol