The theory stating that current flow is produced when an electron from one atom knocks electrons of another atom out of orbit is generally called the  __________ theory.​

Current Flow

The movement of electric charge carriers, like electrons, through a conductor or circuit, typically described from positive to negative points.

Electron

A subatomic particle with a negative electric charge, fundamental to electricity, and a key component of atoms.

Atom

The smallest unit of a chemical element, consisting of a nucleus and electrons, forming the basis of all chemical substances.