Number of units in one mole of any substance (defined as its molecular weight in grams), equal to 6.02214179 1023. The units may be electrons, atoms, ions, or molecules, depending on the nature of the substance and the character of the reaction (if any). See also Avogadro's law; law of mass action; stoichiometry.
This entry comes from Encyclopædia Britannica Concise.For the full entry on Avogadro's number, visit Britannica.com.
What made you look up Avogadro's number? Please tell us what you were reading, watching or discussing that led you here.
Take our visual vocab quiz
A quick quiz about stuff worth knowing
The commonly misspelled words quiz
The Vocab Quiz Game for iPhone & iPad
"Incredibly fun and addictive. And informative!" User Review, iTunes