Atomic number 69 · lanthanide · Atomic mass 168.93 u
| Atomic Number | 69 |
| Atomic Mass | 168.9300 u |
| Category | lanthanide / 镧系元素 |
| Group | — |
| Period | 6 |
| Block | F |
| Electron Configuration | [Xe] 4f¹³ 6s² |
| Electronegativity (Pauling) | 1.25 |
| Phase at STP | Solid |
| Density | 9.32 g/cm³ |
| Year Discovered | 1879 |
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