| Quantity | Value | Units | Value | Units |
| Atomic number | 7 | |||
| Atomic mass | 14.007(2) | g mole-1 | ||
| Specific gravity | 0.8070 | g cm-3 | ||
| Mean excitation energy | 82.0 | eV | ||
| Minimum ionization | 1.813 | MeV g-1cm2 | 1.463 | MeV cm-1 |
| Nuclear collision length | 61.1 | g cm-2 | 75.70 | cm |
| Nuclear interaction length | 89.7 | g cm-2 | 111.1 | cm |
| Pion collision length | 88.4 | g cm-2 | 109.5 | cm |
| Pion interaction length | 121.7 | g cm-2 | 150.8 | cm |
| Radiation length | 37.99 | g cm-2 | 47.07 | cm |
| Critical energy | 75.47 | MeV (for e-) | 73.49 | MeV (for e+) |
| Molière radius | 10.67 | g cm-2 | 13.23 | cm |
| Plasma energy ℏωp | 18.30 | eV | ||
| Muon critical energy | 982. | GeV | ||
| Melting point | 63.15 | K | -210.0 | C |
| Boiling point @ 1 atm | 77.29 | K | -195.9 | C |
| Index of refraction (Na D) | 1.199 |