Radius of nth Bohr Orbit

Radius of nth Bohr Orbit

### Formula:

$$r_n=\frac{n^2h^2}{4\pi^2me^2kZ}$$

### Terminologies:

- $$r_n$$ → Radius of nth orbit.

- n → Principal quantum number.

- h → Planck's constant.

- m → Mass of electron.

- e → Charge of electron.

- k → Electrostatic constant.

- Z → Atomic number.

### Usage:

- Used to calculate radius of electron orbit in hydrogen-like species.