Holmium (Ho)
Holmium (Ho, element 67) is a lanthanide in period 6. Atomic mass 164.93, electron configuration [Xe] 4f¹¹ 6s², uses and facts.
About Holmium
Holmium is a lanthanide with the symbol Ho and atomic number 67. It is a solid at room temperature, and it sits in period 6 of the periodic table. Holmium was discovered in 1878 by Marc Delafontaine.
Holmium key facts
- Atomic number: 67
- Symbol: Ho
- Atomic mass: 164.93 u
- Category: lanthanide
- Group: none (f-block)
- Period: 6
- State at room temperature: solid
- Electron configuration: [Xe] 4f¹¹ 6s²
- Electronegativity (Pauling): 1.23
- Melting point: 1734 K (1460.85 °C)
- Boiling point: 2993 K (2719.85 °C)
- Density: 8.795 g/cm³
- Common oxidation states: +2, +3
Electron configuration
The electron configuration of holmium is [Xe] 4f¹¹ 6s². The part in brackets is the noble gas core; the rest shows how the outer electrons fill their subshells.
Uses of holmium
- Lasers (medical)
- Magnets
- Nuclear reactors
Did you know?
Holmium has the highest magnetic moment of any naturally occurring element.
Neighbouring elements
- Dysprosium (Dy)
- Erbium (Er)
- Lanthanum (La)
- Cerium (Ce)
- Praseodymium (Pr)
- Neodymium (Nd)
- Promethium (Pm)
- Samarium (Sm)
- Europium (Eu)
- Gadolinium (Gd)
Frequently asked questions
What is the atomic number of holmium?
The atomic number of holmium is 67, which means every holmium atom has 67 protons.
What is the electron configuration of holmium?
The electron configuration of holmium is [Xe] 4f¹¹ 6s².
What group and period is holmium in?
Holmium is a lanthanide in period 6.
What state is holmium at room temperature?
Holmium is a solid at room temperature.
What is holmium used for?
Holmium is used for lasers (medical), magnets, nuclear reactors.