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Antimony
Metalloids · Group 15 · Period 5
Atomic properties
| Atomic number | 51 |
|---|---|
| Symbol | Sb |
| Standard atomic weight | 121.76 |
| Classification | Metalloids |
| Group | 15 |
| Period | 5 |
| Block | p-block |
| Electron configuration | [Kr] 4d10 5s2 5p3 |
| Electronegativity (Pauling) | 2.05 |
| Common oxidation states | +5, +3, -3 |
Physical properties
| Phase at 20 °C | Solid |
|---|---|
| Density | 6.685 g/cm³ |
| Melting point | 630.63 °C |
| Boiling point | 1587 °C |
| Discovered | Ancient |
| CAS number | — |