Quantity | Value | Units | Value | Units |
Atomic number | 1 | |||
Atomic mass | 2.014101764(13) | g mole-1 | ||
Specific gravity | 0.1638 | g cm-3 | ||
Mean excitation energy | 21.8 | eV | ||
Minimum ionization | 2.020 | MeV g-1cm2 | 0.3309 | MeV cm-1 |
Nuclear collision length | 51.3 | g cm-2 | 313.5 | cm |
Nuclear interaction length | 71.8 | g cm-2 | 438.2 | cm |
Pion collision length | 81.4 | g cm-2 | 497.1 | cm |
Pion interaction length | 110.1 | g cm-2 | 672.3 | cm |
Radiation length | 125.98 | g cm-2 | 769.1 | cm |
Critical energy | 278.33 | MeV (for e-) | 271.81 | MeV (for e+) |
Molière radius | 9.60 | g cm-2 | 58.60 | cm |
Plasma energy ℏωp | 8.22 | eV | ||
Muon critical energy | 1594. | GeV | ||
Boiling point @ 1 atm | 23.65 | K | -249.5 | C |
Triple point | 18.69 | K | -254.5 | C |
Index of refraction (Na D) | 1.112 |