Fundamental Atomic Units
These four fundamental constants form the basis of the atomic units (see above). Therefore, their numerical values in the atomic units are unity by definition.
| Dimension | Name | Symbol/Definition | Value in SI units |
|---|---|---|---|
| mass | electron rest mass | 9.10938291(40)×10−31 kg | |
| charge | elementary charge | 1.602176565(35)×10−19 C | |
| angular momentum | reduced Planck's constant | 1.054571726(47)×10−34 J·s | |
| electric constant | Coulomb force constant | 8.9875517873681×109 kg·m3·s-2·C-2 |
Read more about this topic: Atomic Units
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