| Quantity | Value | Units |
Value | Units |
| Atomic number |
10 |
|
| |
| Atomic mass |
20.1797(6) |
g mole-1 |
| |
| Specific gravity
(20° C, 1 atm) |
8.385E-04 |
g cm-3 |
| |
| Mean excitation energy |
137.0 |
eV |
| |
| Minimum ionization |
1.724 |
MeV g-1cm2 |
1.446E-03 |
MeV cm-1 |
| Nuclear collision length |
65.7 |
g cm-2 |
7.837E+04
| cm |
| Nuclear interaction length |
99.0 |
g cm-2 |
1.181E+05
| cm |
| Pion collision length |
91.8 |
g cm-2 |
1.095E+05
| cm |
| Pion interaction length |
128.7 |
g cm-2 |
1.534E+05
| cm |
| Radiation length |
28.93
| g cm-2 |
3.450E+04
| cm |
| Critical energy |
67.02 |
MeV (for e-) |
65.47
| MeV (for e+) |
| Molière radius |
9.15 |
g cm-2 |
1.092E+04
| cm |
| Plasma energy ℏωp |
0.59 |
eV |
| |
| Muon critical energy |
907. |
GeV |
| |
| Melting point |
24.56 |
K |
-248.6
| C |
| Boiling point @ 1 atm |
27.07
| K |
-246.1
| C |
| Index of refraction
(0° C, 1 atm, Na D) |
67.1
| (n-1)x106 |
|
| |
For muons,