68 Er
Lanthanide
Erbium
Used in fiber-optic amplifiers.
Properties of Erbium
- Atomic number (Z)
- 68
- Symbol
- Er
- Atomic mass
- 167.26 g/mol
- Category
- Lanthanide
- Group
- 3
- Period
- 6
- Electron configuration
- [Xe] 4f¹² 6s²
- Electronegativity (Pauling)
- 1.24
- Atomic radius
- 226 pm
- First ionization energy
- 589 kJ/mol
- Melting point
- 1802 K (1528.8 °C)
- Boiling point
- 3141 K (2867.8 °C)
- Density
- 9.066 g/cm³
- Phase at 25 °C
- Solid
- Discovered
- Discovered in 1843
Frequently asked questions
What is Erbium?
Erbium (Er) is a lanthanide, element number 68 on the periodic table. Used in fiber-optic amplifiers.
What is the atomic number and atomic mass of Erbium?
Erbium has atomic number 68 and an atomic mass of about 167.26 g/mol.
What is the electron configuration of Erbium?
The electron configuration of Erbium is [Xe] 4f¹² 6s².
Where is Erbium on the periodic table?
Erbium sits in group 3, period 6, and is classified as a lanthanide.