Avogadro doimiysi: Versiyalar orasidagi farq
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Qator 1:
[[Kimyo]] va [[fizika]]da '''Avogadro doimiysi''' (ramzlari: '''''L''''', '''''N''<sub>A</sub>''') zarrachalar (odatda [[atom]] yoki [[molekula]]lar) soni ''N'' ning modda miqdori ''n'' ([[Mol (oʻlchov birligi)|mol]]) ga nisbati ''N''<sub>A</sub> = ''N''/''n'' deb aniqlanadi.<ref name="GreenBook">[http://old.iupac.org/publications/books/gbook/green_book_2ed.pdf Quantities, Units and Symbols in Physical Chemistry]</ref> Yaʼni, u modda [[Molyar massa|molyar massasining]] oʻsha modda [[massa]]siga [[proporsiya]]si faktoridir.<ref name=CODATA>[http://physics.nist.gov/cgi-bin/cuu/Value?na|search_for=avogadro+constant Fundamental Physical Constants]</ref> Avogadro doimiysi 1 mol moddadagi zarrachalar sonini koʻrsatib, {{val|6.02214129|(27)|e=23|u=mol<sup>−1</sup>}} ga tengdir.<ref name="CODATA"/><ref>[http://www.iupac.org/publications/pac/1992/pdf/6410x1535.pdf "Atomic Weight: The Name, Its History, Definition and Units"]</ref><ref>[http://www.iupac.org/publications/pac/1996/pdf/6804x0957.pdf "Glossary of Terms in Quantities and Units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)"]</ref>
Kimyoviy miqdorning avvalgi taʼriflarida '''Avogadro soni''' atamasi ishlatilardi. [[SI|Xalqaro Birliklar Tizimi]] asosiy birliklari toʻplamini qayta koʻrib chiqish natijasida kimyoviy miqdor konseptini yangidan belgilashga zarurat tugʻildi. Avogadro soni [[Jean Baptiste Perrin|Perrin]] tomonidan bir gramm-mol [[vodorod]]dagi molekulalar soni qilib tayinlangan edi. U keyinroq 12 g [[uglerod-12]] izotopidagi atomlar soni qilib belgilandi.<ref name="SI">[http://www.bipm.org/utils/common/pdf/si_brochure_8_en.pdf The International System of Units (SI)]</ref>
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| {{val|6.02214129|(27)|e=23}} mol<sup>−1</sup>
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| {{val|2.73159734|(12)|e=26}} [[
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| {{val|1.707248434|(77)|e=25}} [[
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