Er
Erbium
Element 68 · Lanthanide · Period 6, Group 14
Solid · Discovered 1843
Atomic Properties
| Atomic Number | 68 |
| Atomic Mass | 167.26u |
| Electron Configuration | [Xe]6s2 4f12 |
| Electronegativity | 1.24Pauling |
| Atomic Radius | 235pm |
| Ionization Energy | 6.108eV |
| Oxidation States | +3 |
Physical Properties
| Standard State | Solid |
| Melting Point | 1802K |
| Boiling Point | 3141K |
| Density | 9.07g/cm³ |
| Group Block | Lanthanide |
| Year Discovered | 1843 |