| Name | Symbol | Value |
| atomic mass constant | mu | 1.660539x10-27 kg |
| Bohr magneton | mB | 9.274009x10-24 J/T |
| Bohr radius | a0 | 5.291772x10-11 m |
| electron Compton wavelength | lc | 2.426310x10-12 m |
| electron magnetic moment | me | 9.284764x10-24 |
| electron radius (classical) | re | 2.817940x10-15 m |
| electron rest mass | me | 9.109382x10-31 kg |
| fine-structure constant | a | 7.297353x10-3 |
| neutron magnetic moment | mn | 9.662364x10-27 J/T |
| neutron rest mass | mn | 1.674927x10-27 kg |
| nuclear magneton | mN | 5.050783x10-27 J/T |
| proton Compton wavelength | lc,p | 1.321410x10-15 m |
| proton magnetic moment | mp | 1.410607x10-26 J/T |
| proton rest mass | mp | 1.672622x10-27 kg |
| Rydberg constant |  |
1.097373x107 /m |
