Atomic number 88 · alkaline earth · Atomic mass 226 u
| Atomic Number | 88 |
| Atomic Mass | 226.0000 u |
| Category | alkaline earth / 碱土金属 |
| Group | 2 |
| Period | 7 |
| Block | S |
| Electron Configuration | [Rn] 7s² |
| Electronegativity (Pauling) | 0.9 |
| Phase at STP | Solid |
| Density | 5.5 g/cm³ |
| Year Discovered | 1898 |
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