68
Er
167.26
Erbium (Er)
Element 68 · Period 6 · Lanthanide series
lanthanide
solid at room temp
f-block
About Erbium
Used in fiber optic amplifiers, infrared lasers, and pink glass coloring.
Physical Properties
Atomic Mass
167.26 u
State at 25°C
Solid
Melting Point
1529 °C
Boiling Point
2868 °C
Density
9.066 g/cm³
Magnetism
Paramagnetic
Atomic Properties
Electron Configuration
[Xe] 4f¹² 6s²
Electron Shells
2, 8, 18, 30, 8, 2
Electronegativity
1.24
Atomic Radius
226 pm
Ionization Energy
589 kJ/mol
Oxidation States
+3
Discovery & History
Discovered By
Carl Gustaf Mosander
Discovery Year
1843
Named By
Carl Gustaf Mosander
Name origin: Ytterby, Sweden
Frequently Asked Questions
- Is Erbium a metal, nonmetal, or metalloid?
- Erbium is classified as a lanthanide.
- What state is Erbium in at room temperature?
- Erbium is a solid at standard room temperature (25°C).
- What is the atomic mass of Erbium?
- Erbium has an atomic mass of 167.26 atomic mass units (u).
- Who discovered Erbium?
- Erbium was discovered by Carl Gustaf Mosander in 1843.
- Where is Erbium on the periodic table?
- Erbium is element number 68, located in period 6, part of the lanthanide series shown below the main table.