Energy of Electron in nth Orbit

Energy of Electron in nth Orbit

### Formula:

$$E_n=-\frac{13.6Z^2}{n^2}\ eV$$

### Terminologies:

- $$E_n$$ → Energy of electron in nth orbit.

- Z → Atomic number.

- n → Principal quantum number.

- eV → Electron volt; unit of energy.

- Negative sign → Represents electron being bound to nucleus.

### Usage:

- Used to calculate energy of electron in hydrogen-like species.