Periodic Table of the Elements: Erbium
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| Atomic Number: | 68 |
| Atomic Symbol: | Er |
| Erbiumerbium [from Ytterby, a town in Sweden], metallic chemical element; symbol Er; at. no. 68; at. wt. 167.259; m.p. 1,529°C;; b.p. 2,863°C;; sp. gr. 9.05 at 25°C;; valence +3. Erbium is a soft, malleable, lustrous, silvery metal. ..... Click the link for more information. | |
| Atomic Weight: | 167.259 |
| Electron Configuration: | 2 · 8 · 18 30 · 8 · 2 |