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, which is 2 in the outermost shell.
Related: electron configuration, the Bohr model, valence electrons.
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
Holmium: frequently asked questions
- What is Holmium?
- Holmium (Ho) is the chemical element with atomic number 67. It is a metal: specifically a lanthanide.
- What is the atomic number of Holmium?
- Holmium's atomic number is 67, which means every Holmium atom has 67 protons in its nucleus.
- What is the electron configuration of Holmium?
- The electron configuration of Holmium is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f11 (noble-gas shorthand: [Xe] 4f11 6s2). Its electrons are arranged in shells of 2, 8, 18, 29, 8, 2, with 2 in the outermost shell.
- Is Holmium a metal or a nonmetal?
- Holmium is a metal: specifically a lanthanide.
- What group and period is Holmium in?
- Holmium sits in the f-block (the lanthanide row) of period 6 on the periodic table.
- Is Holmium a solid, liquid, or gas?
- At room temperature, Holmium is a solid.
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.