- Atomic Radius (Å)
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.
67 Atomic Number
164.93 u Atomic Mass
1743.15 K Melting Point
2993 K Boiling Point
8.79 g/cm³ Density
2.5 Å Atomic Radius
1.92 Å Covalent Radius
1.23 Electronegativity
6.02 eV First Ionization Energy
32.61 Electron Affinity
6 Number of Shells
2, 8, 18, 29, 8, 2 Electron Shell Occupations
0.17 J/g Specific Heat