Avogadro's number

1 7.4

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

noun
/ˌævəˈɡɑːdroʊz ˈnʌmbər/

Specialized

: número de Avogadro

In chemistry, Avogadro's number is approximately 6.022 × 10²³, which represents the quantity of particles in a mole.

Examples

Avogadro's number is used to calculate the number of molecules in one mole of a gas.
So we need to get rid of this mole term and we use Avogadro's number to do that.
To determine the mass of one mole of a substance, we apply Avogadro's number to find the total number of atoms.

Synonyms

Avogadro number

vsAvogadro's number

Specialized

1 6.9

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

is the same quantity but written with a possessive form

Surface Forms

Avogadro's number singular

Morphology

Avogadro's + number

The constituent 'number' signals this is a specific numerical constant associated with Avogadro, so learners can infer it refers to some named number. However, 'Avogadro's' is a proper name and gives no clue about the specialized scientific sense (the number of entities per mole) or its magnitude, so the full meaning is not predictable without prior exposure.

Etymology

Avogadro's number is named after the Italian scientist Amedeo Avogadro, who first thought about how many tiny particles there are in matter. His name became the label for the very large number used to count the tiny particles in 'one mole', so today Avogadro's number means 'the number of particles in a mole'.