Avogadrov broj

Za drugu upotrebu, v. Broj (Razvrstavanje).

Avogadrov broj, poznat još i kao Avogadrova konstanta, je broj molekula u jednom molu supstance.^[1] Označava se simbolom N_A (ili L po austrijkom fizičaru Johanu Jozefu Lošmitu, koji je prvi odredio približnu veličinu molekula, ali ovo drugo se izbegava jer L je oznaka i za Lošmitovu konstantu). Zvanično je definisan kao broj atoma C-12 u 12 grama ove supstance. Avogadrov broj iznosi 6,022 141 99(47) · 10²³ mol^-1.^[2]^[3]^[4]

Treba skrenuti pažnju da Avogadrov broj nije bezdimenziona veličina.

Avogadrov broj se koristi za određivanje ne samo broja molekula već i jona i atoma.

↑ International Union of Pure and Applied Chemistry (1993). Quantities, Units and Symbols in Physical Chemistry, 2nd edition, Oxford: Blackwell Science. ISBN 0-632-03583-8. p. 4. Electronic version.
↑ Mohr Peter J., Taylor Barry N., Newell David B. (2008). „CODATA Recommended Values of the Fundamental Physical Constants: 2006”. Reviews of Modern Physics 80 (2): 633–730. Bibcode 2008RvMP...80..633M. DOI:10.1103/RevModPhys.80.633. Direct link to value.
↑ International Union of Pure and Applied Chemistry, Commission on Atomic Weights and Isotopic Abundances, P.; Peiser, H. S. (1992). „Atomic Weight: The Name, Its History, Definition and Units” (PDF). Pure and Applied Chemistry 64 (10): 1535-43. DOI:10.1351/pac199264101535. Pristupljeno 2006-12-28.
↑ International Union of Pure and Applied Chemistry, Commission on Quantities and Units in Clinical Chemistry, H. P.; International Federation of Clinical Chemistry Committee on Quantities and Units (1996). „Glossary of Terms in Quantities and Units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)” (PDF). Pure and Applied Chemistry 68 (4): 957-1000. DOI:10.1351/pac199668040957. Pristupljeno 2006-12-28.

[1] International Union of Pure and Applied Chemistry (1993). Quantities, Units and Symbols in Physical Chemistry, 2nd edition, Oxford: Blackwell Science. ISBN 0-632-03583-8. p. 4. Electronic version.

[CODATA-2] Mohr Peter J., Taylor Barry N., Newell David B. (2008). „CODATA Recommended Values of the Fundamental Physical Constants: 2006”. Reviews of Modern Physics 80 (2): 633–730. Bibcode 2008RvMP...80..633M. DOI:10.1103/RevModPhys.80.633. Direct link to value.

[3] International Union of Pure and Applied Chemistry, Commission on Atomic Weights and Isotopic Abundances, P.; Peiser, H. S. (1992). „Atomic Weight: The Name, Its History, Definition and Units” (PDF). Pure and Applied Chemistry 64 (10): 1535-43. DOI:10.1351/pac199264101535. Pristupljeno 2006-12-28.

[4] International Union of Pure and Applied Chemistry, Commission on Quantities and Units in Clinical Chemistry, H. P.; International Federation of Clinical Chemistry Committee on Quantities and Units (1996). „Glossary of Terms in Quantities and Units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)” (PDF). Pure and Applied Chemistry 68 (4): 957-1000. DOI:10.1351/pac199668040957. Pristupljeno 2006-12-28.

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