Bohr radius
The Bohr radius () is a physical constant, approximately equal to the most probable distance between the nucleus and the electron in a hydrogen atom in its ground state. It is named after Niels Bohr, due to its role in the Bohr model of an atom. Its value is 5.29177210903(80)×10−11 m.
| Symbol | a0 or rBohr |
|---|---|
| Named after | Niels Bohr |
| Approximate values (to three significant digits) | |
| SI units | 5.29×10−11 m (52.9 pm) |
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