67 Ho 164.93
Holmium
lanthanide
Properties
- Atomic number
- 67
- Atomic mass
- 164.93 u
- Category
- lanthanide
- Group
- f-block
- Period
- 6
- Block
- f-block
- State (room temp)
- Solid
- Outer-shell electrons
- 2
- Electronegativity
- 1.23 (Pauling)
- Density
- 8.79 g/cm³
- Melting point
- 1460.85 °C
- Boiling point
- 2599.85 °C
Electron configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹¹
Noble-gas shorthand: [Xe] 4f¹¹ 6s²
Electrons per shell: 2, 8, 18, 29, 8, 2 — that's 2 in the outermost shell.
About Holmium
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.
- Discovered by Marc Delafontaine
- Appearance: silvery white
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.