IEVref: 113-02-18 ID: Language: en Status: Standard Term: Avogadro number Synonym1: Synonym2: Synonym3: Symbol: N0 Definition: conventional number equal to the numerical value 6,022 140 76 × 1023 of the Avogadro constant expressed in reciprocal mole Note 1 to entry: The Avogadro number is chosen such that the molar mass of carbon 12 is 0,012 kg/mol with a relative standard uncertainty of 4,5 × 10−10. Note 2 to entry: Sometimes the synonym “Loschmidt number” is used, denoted by the symbol “L”. Publication date: 2020-12 Source: SI Brochure, 9th edition, 2019, Appendix 1, modified – The definition in the SI Brochure has been revised to comply with the IEV rules. The synonym "Loschmidt number" and the symbol "L" have been added to Note 2 to entry. Replaces: Internal notes: CO remarks: TC/SC remarks: VT remarks: Domain1: Domain2: Domain3: Domain4: Domain5: