Index

DEFININGCONSTANTSYMBOL: N_A

  • PID: si:definingconstantsymbol:N_A:2019
  • Definition: The Avogadro constant, NA, is exactly 6.022 140 76 × 1023 mol-1
  • Source: SI Brochure 9th Ed. 2019, p 127
  • Formatted: 6.022 140 76 x 1023 mol-1
  • Numerical Value: 6.02214076E+23
  • Unit: mol-1
  • Unit in Base SI: mol-1
  • Notes
    1. This value was fixed by the CGPM in 2018 (Resolution 1), with effect from 20 May 2019.
    2. The Avogadro constant is a proportionality constant between the quantity "amount of substance" (with unit mole) and the quantity for counting entities (with unit one, symbol 1).
  • Representations
    • Text: N_A
    • HTML: <em>N</em><sub>A</sub>
    • Latex: N_{\rm{A}}
  • Related Definitions