This page explains Avogadro's number, 6.02×1023, which quantifies the number of representative particles in a mole, allowing chemists to measure atoms and molecules. It discusses the mol...This page explains Avogadro's number, 6.02×1023, which quantifies the number of representative particles in a mole, allowing chemists to measure atoms and molecules. It discusses the mole as the SI unit for substance amount, with representative particles being atoms for elements and molecules for compounds. Additionally, it mentions National Mole Day, celebrating this key chemistry concept.