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84
Po
[209]
Polonium
Post-transition metals · Group 16 · Period 6
Atomic properties
| Atomic number | 84 |
|---|---|
| Symbol | Po |
| Standard atomic weight | [209] |
| Classification | Post-transition metals |
| Group | 16 |
| Period | 6 |
| Block | p-block |
| Electron configuration | [Xe] 4f14 5d10 6s2 6p4 |
| Electronegativity (Pauling) | 2.00 |
| Common oxidation states | +4, +2 |
Physical properties
| Phase at 20 °C | Solid |
|---|---|
| Density | 9.20 g/cm³ |
| Melting point | 254 °C |
| Boiling point | 962 °C |
| Discovered | 1898 |
| CAS number | — |