Free electron
# Free electron

Free electron in physics may refer to:

* Electron, as a free particle
* Solvated electron
* Charge carrier, as carriers of electric charge
* Valence electron, as an outer shell electron that is associated with an atom
* Valence and conduction bands, as a conduction band electron relative to the electronic band structure of a solid
* Fermi gas, as a particle of a non-interacting electron gas
* Free electron model, as a particle in the Drude-Sommerfeld model of metals
* Free-electron laser, as a particle in the electron beam
