Amount of substance of an object is a physical quantity that measures the number of elementary entities in the object compared with the number of elementary entities in 0.012 kilogram of pure carbon-12 (elementary entities may be atoms, molecules, ions, electrons, or particles). This latter quantity is deemed a unit amount of substance.

The SI unit for amount of particulate substance is the mole (mol).

The amount of substance is not the same as the amount of matter (mass).

Physical quantity | Chemical properties

Kementad danvez | Látkové množství | Stofmængde | Stoffmenge | Cantidad de sustancia | Quantité de matière | Quantità di sostanza | Liczność materii | Quantidade de substância | Cantitate de substanţă | Látkové množstvo | Ainemäärä | Substansmängd | 物质的量