The electric charge of one electron is equal in magnitude and opposite in sign to the charge of one proton An ion is an atom or molecule that has nonzero total charge due to having unequal numbers of electrons and protons

The SI unit for charge is the coulomb (C), with protons and electrons having charges of opposite sign but equal magnitude; the magnitude of this basic charge ∣ q e ∣ is ∣ q e ∣ = 1.60 × 10 - 19 C The vast majority of positive charge in nature is carried by protons, while the vast majority of negative charge is carried by electrons

electric charge — a physical property of an object that causes it to be attracted toward or repelled from another charged object; each charged object generates and is influenced by a force called…. field — a map of the amount and direction of a force acting on other objects, extending out into space. electric field — a three-dimensional map of the electric force extended out into space from a point charge. SI unit for charge — the coulomb (C), with protons and electrons having charges of opposite sign but equal magnitude; the magnitude of this basic charge ∣ q e ∣ is ∣ q e ∣ = 1.60 × 10 - 19 C.