Erbium vs Ytterbium
| Property | Er Erbium | Yb Ytterbium |
|---|---|---|
| Atomic number | 68 | 70 |
| Symbol | Er | Yb |
| Name | Erbium | Ytterbium |
| Category | lanthanide | lanthanide |
| Standard Atomic Weight | 167.259 u | 173.054 u |
| Period | 6 | 6 |
| Group | N/A | N/A |
| Block | s | s |
| Phase at STP | solid | solid |
| Electron configuration | [Xe]6s24f12 | [Xe]6s24f14 |
| Oxidation states | [0, 1, 2, 3] | [0, 1, 2, 3] |
| Electronegativity (Pauling) | 1.24 | N/A |
| Electron affinity | 0.312 eV | -0.02 eV |
| Density | 9070 kg/m³ | 6900 kg/m³ |
| Melting point | 1528.85 °C | 818.85 °C |
| Boiling point | 2867.85 °C | 1195.85 °C |
| Discovery year | 1843 | 1878 |