binary compounds
compounds composed of two different elements
monatomic ions
ions formed from a single atom
nomenclature
naming system
oxyanions
polyatomic ions that contain oxygen
salt
an ion compound composed of a cation and the anion from an acid
oxidation numbers
used in order to indicate the general distribution of electrons among the bonded atoms in a molecular compound or a polyatomic anion are assigned to the atoms composing the compound or ion
oxidation states
also called as oxidation numbers
formula mass
any molecule, formula unit, or ion is the sum of the average atomic masses of all the atoms represented in its formula
percentage composition
the percentage by mass of each element in a compound
empircal formula
consists of the symbols for the elements combined in a compound, with subscripts showing the smallest whole-number mole ration of the different atoms in the compound