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This page provides a simple browsing interface for finding entities described by a property and a named value. Other available search interfaces include the page property search, and the ask query builder.
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- Avogadro constant + ([[File:Table Physical constants.png|left|4 โฆ [[File:Table Physical constants.png|left|400px|thumb|]] {''Quote''} The '''Avogadro constant''' ''N''<sub>A</sub> is a proportionality constant between the quantity [[amount]] of substance (with unit [[mole]]) and the quantity for [[count |counting entities]] ... One mole contains exactly 6.022 140 76 ร 10<sup>23</sup> elementary [[entity |entities]]. This number is the fixed numerical value of the Avogadro constant, ''N''<sub>A</sub>, when expressed in the unit mol<sup>โ1</sup> and is called the Avogadro number {''End of Quote'': [[Bureau International des Poids et Mesures 2019 The International System of Units (SI)]]}. </br></br>Thus the Avogadro constant ''N''<sub>A</sub> has the SI unit 'per mole' [mol<sup>-1</sup>], but more strictly the unit for counting entities per amount is 'units per mole' [xยทmol<sup>-1</sup>] (compare [[elementary charge]]). Therefore, ''N''<sub>A</sub> is 'count per amount' with units 'counting units per mole'. The Avogadro constant times elementary charge is the [[Faraday constant]].raday constant]].)