68Er
Element 68
Erbium
Lanthanides
Erbium is a chemical element in the lanthanide series, with symbol Er and atomic number 68.
Key data
- Atomic number
- 68
- Atomic mass
- 167.259 u
- Group / Period
- 3 / 6
- Block
- f-block
- Phase at STP
- Solid
- Density
- 9.066 g/cm³
- Melting point
- 1528.8 °C
- Boiling point
- 2867.8 °C
- Electron configuration
- [Xe] 4f12 6s2
Common uses
- •Pink optical glass
- •Fiber-optic amplifiers
- •Nuclear control rods
Discovery
Year: 1843
Discovered by: Carl Gustaf Mosander
Frequently asked questions
What is the atomic number of Erbium?
Erbium has atomic number 68. Its symbol is Er and its atomic mass is 167.259 u.
What category of element is Erbium?
Erbium is classified as lanthanides. It sits in group 3, period 6 of the periodic table.
What is Erbium used for?
Common uses of Erbium include: Pink optical glass, Fiber-optic amplifiers, Nuclear control rods.
When was Erbium discovered?
Erbium was discovered in 1843 by Carl Gustaf Mosander.
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 →