Question

What is the elementary charge of an atom?

Answer 1

The elementary charge, usually denoted by e or sometimes q e, is the electric charge carried by a single proton or, equivalently, the magnitude of the electric charge carried by a single electron, which has charge −1 e . This elementary charge is a fundamental physical constant.

Answer 2

Explanation:

The elementary charge, usually denoted by e or sometimes qe, is the electric charge carried by a single proton or, equivalently, the magnitude of the electric charge carried by a single electron, which has charge −1 e.[2] This elementary charge is a fundamental physical constant. To avoid confusion over its sign, e is sometimes called the elementary positive charge.

Elementary electric charge

Definition:

Charge of a proton

Symbol:

e or sometimes qe

Value in coulombs:

1.602176634×10−19 C[1]

From the 2019 redefinition of SI base units, that took effect on 20 May 2019, its value is exactly 1.602176634×10−19 C[1] by definition of the coulomb. In the centimetre–gram–second system of units (CGS), it is 4.80320425(10)×10−10 statcoulombs.[3]