67Ho
Element 67
Holmium
Lanthanides
Holmium is a chemical element with symbol Ho and atomic number 67.
Key data
- Atomic number
- 67
- Atomic mass
- 164.930 u
- Group / Period
- 3 / 6
- Block
- f-block
- Phase at STP
- Solid
- Density
- 8.79 g/cm³
- Melting point
- 1460.8 °C
- Boiling point
- 2599.8 °C
- Electron configuration
- [Xe] 4f11 6s2
Common uses
- •Strongest magnets known
- •Surgical lasers
- •Nuclear control rods
Discovery
Year: 1878
Discovered by: Marc Delafontaine
Frequently asked questions
What is the atomic number of Holmium?
Holmium has atomic number 67. Its symbol is Ho and its atomic mass is 164.93 u.
What category of element is Holmium?
Holmium is classified as lanthanides. It sits in group 3, period 6 of the periodic table.
What is Holmium used for?
Common uses of Holmium include: Strongest magnets known, Surgical lasers, Nuclear control rods.
When was Holmium discovered?
Holmium was discovered in 1878 by Marc Delafontaine.
Play the game
Test your knowledge in The Lab
20-round element ID, cryptic 3-clue guesser, and an interactive periodic table.
Open The Lab →