Bohr Radius

a_0 = \frac{4\pi\varepsilon_0\hbar^2}{m_e e^2} \approx 5.29 \times 10^{-11}\text{ m}

The most probable distance between electron and nucleus in a hydrogen atom ground state.

Variables

a_0

Bohr radius

m

\varepsilon_0

Permittivity of free space

F/m

\hbar

Reduced Planck constant

J·s

m_e

Electron mass

kg

e

Electron charge

C

Your notes

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