| Atomic number | : | 22 |
| Atomic mass | : | 47.90 g.mol-1 |
| Electronegativity according to Pauling | : | 1.5 |
| Density | : | 4.51g.cm-3 at 20 °C |
| Melting point | : | 1660 °C |
| Boiling point | : | 3287 °C |
| Vanderwaals radius | : | 0.147 nm |
| Ionic radius | : | 0.09 (+3) nm ; 0.068 (+4) nm |
| Isotopes | : | 8 |
| Electronic shell | : | [Ar] 3d2 4s2 |
| Energy of first ionisation | : | 658 kJ.mol-1 |
| Energy of second ionisation | : | 1310 kJ.mol-1 |
| Energy of third ionisation | : | 2652 kJ.mol-1 |
| Energy of fourth ionisation | : | 4175 kJ.mol-1 |
| Discovered by | : | William Gregor in 1791 |
Periodic Table of Elements
