A-level Chemistry/OCR (Salters)/Physical quantities

Physical quantitySymbol for quantityUnit(s)*Symbol for unit(s)concentrationcmole per cubic metremole per litremole per cubic decimetremol m−3mol l−1mol dm−3energyEjoulekilojouleJkJfrequencyν (Greek letter nu)hertzreciprocal secondHzs−1chargeQcoulombCamount of substancenmolemolmassmkilogramgramkggmolar massMgram per moleg mol−1relative molecular massMrno unitno unitwavelengthλmetrem * Note that SI units are shown in bold Notes: An SI unit named after a person has the first letter of its symbol capitalised, but the full name of the unit written out is all lower case. For example, the unit of energy named after James Joule is called the joule (lower case) and has the symbol J (upper case). An SI unit that is not named after a person has an all-lowercase name and symbol. For example, the unit of amount of substance is called the mole (lowercase) and has the symbol mol (lowercase). The symbols for quantities are always in italic type, whereas the symbols for units are always in upright (normal) type.