68Er
Erbium
Lanthanide
Properties of Erbium
- Atomic number (Z)
- 68
- Symbol
- Er
- Name
- Erbium
- Atomic mass
- 167.259 u
- Period
- 6
- Group
- —
- Family
- Lanthanides (f-block)
- Classification
- Lanthanide
- Electron configuration
- [Xe] 4f¹² 6s²
About Erbium
Erbium is a chemical element with symbol Er and atomic number 68 (atomic mass of about 167.259 u). It is classified as a lanthanide on the periodic table.
On the periodic table, Erbium is located in period 6, outside the numbered groups (f-block), belonging to the lanthanides (f-block) family. An element's position reveals trends in its properties, such as atomic radius, electronegativity and metallic character.
The electron configuration of Erbium is [Xe] 4f¹² 6s², which determines how it forms chemical bonds and takes part in reactions.