The elementary charge, often denoted as "e," is the electric charge carried by a single proton or an electron. In the International System of Units (SI), the elementary charge is approximately equal to:
e ≈ 1.602176634 × 10^-19 coulombs.
This value represents the fundamental unit of electric charge and is a fundamental constant in physics. It plays a crucial role in describing the behavior of charged particles in electromagnetic interactions and is used in various fields of science, including physics, chemistry, and electronics.