Metalen
Calcium, Ca relatieve atoommassa is 40,08 u
Aluminium, Al, relatieve atoommassa is 26,98 u
Moleculen
Water, H2O: 2 x 1,008 + 16,00 = 18,016 u
Butaan, C4H10: 4 x 12,01 + 10 x 1,008 = 58,12 u
Zouten
Natriumcloride, NaCl: 22,99 + 35,45 = 58,44 u