Fundamental Physical Constants
| Name | Letter | Value |
| Avogadro's number | NA | 6.0221367 × 1023 mol-1 |
| Electron charge | e | 1.60217733 × 10-19C |
| 4.80324 × 10-10 esu | ||
| Electron mass | me | 9.1093897 × 10-31 kg |
| 0.51099906 MeV | ||
| Molar gas constant | R=NAk | 0.08205783 L·atm·K-1mol-1 |
| 8.314510 J·K-1mol-1 | ||
| 1.987216 cal·K-1mol-1 | ||
| Rydberg constant | Ræ | 1.0973731534 × 107 m-1 |
| Boltzmann constant | k | 1.380658 × 10-23 J·K-1 |
| 8.617385 × 10-5 eV·K-1 | ||
| Faraday constant | F=NAe | 9.6485309 × 104 C/mol |
| Planck's constant | h | 6.6260755 × 10-34 J·s |
| Proton mass | mp | 1.6726231 × 10-27 kg |
| 1.007256 amu | ||
| 938.27231 MeV | ||
| Speed of light | c | 2.99792458 × 108 m/s |
| Bohr magneton | mB | 9.2740154 × 10-24 J·T-1 |
| 5.78838263 × 10-5 eV·T-1 | ||
| 1.39962418 × 1010 Hz·T-1 | ||
| Fine-structure constant | a = moce2/2h | 7.29735308× 10-3 = 1/137.036 |
| Bohr radius | aB= eoh2/pmee2 | 5.2918 x 10-11 m |
| Permeability of free space | mo | 1.25664 × 10-6 N·A-2 |
| Permittivity of free space | eo= 1/c2mo | 8.854187817 × 10-12 F·m-1 |
Thermal energy at T=293K is equivalent to:
| 4.045 ×10-21 J | 2.525×10-2 eV | 6.105 ×1012 Hz | 203.65 cm-1 | 0.582 kcal/mol | 2.436 kJ/mol |
See also:
Fundamental Physical Constants from NIST