68Er167.26
Erbium
Lanthanide · element 68 · f-block (shown below the main table)
Quick facts
| Symbol | Er |
|---|---|
| Atomic number | 68 |
| Relative atomic mass | 167.26 |
| Category | Lanthanide |
| Position | f-block (shown below the main table) |
| State at 20 °C | Solid |
| Melting point | 1,529 °C |
| Boiling point | 2,868 °C |
| Density | 9.07 g/cm³ |
| Electronegativity | 1.24 |
| Electron configuration | [Xe] 4f12 6s2 |
About Erbium
Erbium has the symbol Er and atomic number 68, which means every erbium atom has 68 protons in its nucleus and, in a neutral atom, 68 electrons. At room temperature it is a solid.
Lanthanides are the first row of the f-block. Many are used in strong magnets, screens and lasers.
It melts at 1,529 °C and boils at 2,868 °C.
Explore it
See where erbium sits, and drag the temperature slider to watch it melt and boil, on the interactive periodic table. Practise with quizzes on OmniEx.