The charge of an electron is a fundamental concept in physics that has far-reaching implications in various fields, including chemistry, electronics, and engineering. Understanding the charge of an electron is crucial for grasping the behavior of atoms, molecules, and electrical currents. The elementary charge, usually denoted by e, is a fundamental physical constant, defined as the electric charge carried by a single proton (+1 e) or, equivalently, the magnitude of the negative electric charge carried by a single electron , which has charge −1 e. [2][a] Electric charge is a property of matter where it experiences a force when in an electromagnetic field. The idea behind it is: Learn what an electron is, how it was discovered, and how its charge was measured by Robert Millikan in his oil-drop experiment. Find out the value of the electron charge in coulombs and its relation to other subatomic particles.
