Avogadro number

1 6.9

The number of atoms or molecules in one mole, about 6.022 × 10^23

noun
/ˌævəˈɡɑːdroʊ ˈnʌmbər/

Specialized

: número de Avogadro

In chemistry, Avogadro's number indicates that one mole of a substance contains approximately 6.022 × 10²³ particles.

Examples

So number of molecules is just Avogadro number times number of moles.
The word mole, not the creature that lives under the ground, but the the mole is Avogadro's number of molecules.
So here we can just do the conversion of units and then we're going to use Avogadro's number to give us that per mole.
He'd say, "You know what Avogadro's number is?

Blog text (26)
I don't think even he cares about Avogadro's number.

Blog text (26)
To determine the number of atoms in a sample, you can multiply the amount in moles by Avogadro's number.
Avogadro's number is essential for converting between the number of particles and the amount of substance in moles.

Synonyms

Avogadro's number

vsAvogadro number

Specialized

1 7.4

The number of atoms or molecules in one mole of a substance, about 6.022 × 10^23

is the same concept but uses a nonpossessive standard form

Surface Forms

Avogadro number singular

Avogadro numbers plural

Avogadro's number singular

Morphology

Avogadro + number

This is a proper-name technical term: combining the scientist's name 'Avogadro' with 'number' only signals that it is some number associated with Avogadro, but it gives no clue to the specific chemical concept or the value (~6.022×10^23). The precise meaning is a disciplinary convention (number of particles per mole) and cannot be derived by a B1 learner from the constituents alone, so the expression is not transparent.

Etymology

Avogadro number is named after the Italian scientist Amedeo Avogadro, who showed that you can count tiny particles by using the idea of a 'mole'. Think of it as a chemical 'dozen': one 'mole' contains this huge number of atoms or molecules (about 6.02 × 10^23), so the name means the count of particles in a mole.