Avogadro's number

noun, Chemistry

the constant, 6.022 × 10 ²³ , representing the number of atoms, molecules, or ions in one mole of a substance. Symbol: N.

Compare gram-atom, gram molecule.

Also called Avogadro constant.

Compare Loschmidt's number.

Origin

1925-30; see Avogadro's law

British Dictionary definitions for Avogadro's number

Avogadro's constant

noun

the number of atoms or molecules in a mole of a substance, equal to 6.022 52 × 1023 L, NA

Avogadro's number in Medicine

Avogadro's number n.
The number of molecules in a mole of a substance, approximately 6.0225 × 10²³. Also called Avogadro's constant.

Avogadro's number in Science

Avogadro's number
The number of atoms or molecules in a mole of a substance, approximately 6.0225 × 10²³. It is based on the number of carbon atoms in 12 grams of carbon 12.