Amedeo Avogadro
…molecules, ions or other particles) in a substance to its amount of substance (the latter having the unit mole), 6.02214076×1023 mol−1, is known as the Avogadro constant. This constant is denoted NA, and is one of the seven defining constants of the SI. Amedeo Avogadro was born in Turin to a noble family of the Kingdom…