IEVref: 113-05-16 ID: Language: en Status: Standard Term: elementary electric charge Synonym1: elementary charge [Preferred] Synonym2: Synonym3: Symbol: e Definition: fundamental physical constant equal to the quantum of electric charge, the value of which is set to exactly 1,602 176 634 × 10−19 C Note 1 to entry: The elementary electric charge is equal to the charge of the proton and opposite to the charge of the electron. Note 2 to entry: The elementary electric charge is used in the SI to define the ampere. Publication date: 2020-12 Source: SI Brochure, 9th edition, 2019, 2.2, modified – The full form of the term, including the adjective "electric", has been specified as the preferred term to differentiate clearly this quantity from other charges such as "color charge". The term specified in the SI Brochure has been given as a synonym. The definition in the SI Brochure has been revised to comply with the IEV rules. Replaces: 113-05-16:2011-04 Internal notes: CO remarks: TC/SC remarks: VT remarks: Domain1: Domain2: Domain3: Domain4: Domain5: