"Chemical Amount" or "Chemiance": Proposed Names for the QuantityMeasured in Mole Units Mole is one of the seven base units of the SI. By definition, a unit of measurement is a defined amount or magnitude of a quantity. Thus, meter is a specified magnitude of length, kilogram of mass, and second of time. In these three instances, the resoeetive auantities have eenerallv acceotedorooer . . . names. In three other cases. the names of the quantities consist of two words: nmnere is the SI haw unit of electric current. kelvin of thermodvnamic temoerature. and candela of luminous mtmsity 111. In :it Irart t u b d t l w r r (IIZFS. I I W quillfymg ~dlrc11vei ~ a ~ u ' l w ~ t t :part d v l t h r nnrnr:nmprrr rannot be used for the r n ~ a ~ u r e m c on tf c ~ m r n ingmrral, ~s llut only c,frlertm