| Quantity | Value | Units | Value | Units |
| Atomic number | 17 | |||
| Atomic mass | 35.453(2) | g mole-1 | ||
| Specific gravity | 1.574 | g cm-3 | ||
| Mean excitation energy | 174.0 | eV | ||
| Minimum ionization | 1.608 | MeV g-1cm2 | 2.531 | MeV cm-1 |
| Nuclear collision length | 73.8 | g cm-2 | 46.88 | cm |
| Nuclear interaction length | 115.7 | g cm-2 | 73.51 | cm |
| Pion collision length | 99.5 | g cm-2 | 63.23 | cm |
| Pion interaction length | 144.9 | g cm-2 | 92.08 | cm |
| Radiation length | 19.28 | g cm-2 | 12.25 | cm |
| Critical energy | 34.32 | MeV (for e-) | 33.35 | MeV (for e+) |
| Molière radius | 11.91 | g cm-2 | 7.567 | cm |
| Plasma energy ℏωp | 25.03 | eV | ||
| Muon critical energy | 506. | GeV | ||
| Melting point | 171.6 | K | -101.5 | C |
| Boiling point @ 1 atm | 239.1 | K | -34.04 | C |