Compound Naming Basics Chemical compounds have unique names because they have unique chemical properties. Binary compounds are made of only 2 elements The cation (+ ion) is listed first. The anion (- ion) is listed second. The ending of the anion is changed to –ide i.e. sodium + chlorine  sodium chloride. Try potassium + sulfur _____________ Try magnesium + oxygen __________ potassium sulfide magnesium oxide

Compound Naming Basics Use Greek prefixes if there is more than one of any element. mono – one di – two tri – three tetra – four penta – five hexa - six hepta – seven octa – eight nona – nine deca - ten i.e. carbon + 4 chlorine  carbon tetrachloride Try magnesium + 2 fluorine _____________ Try 2 calcium + carbon  ______________ magnesium difluoride dicalcium carbide

Compound Naming Basics Some atoms bond so strongly they form groups that act like single atoms when bonding. Polyatomic Ion Groups Acetate C2H3O2 -1 Bicarbonate HCO3 -1 Hydroxide OH -1 Nitrate NO3 -1 Nitrite NO2 -1 Carbonate CO3 -2 Sulfate SO4 -2 Sulfite SO3 -2 Phosphate PO4 -3 Ammonium NH4 +1

Compound Naming Basics These polyatomic ion groups retain their names. (Don’t add –ide, but do use prefixes.) i.e. K2SO4 is dipotassium sulfate Try Na3PO4 ___________ Try Fe2CO3 ___________ Try NH4Cl __________ trisodium phosphate diiron carbonate ammonium chloride

Compound Naming Basics Greek Prefixes mono – one di – two tri – three tetra – four penta – five hexa - six hepta – seven octa – eight nona – nine deca - ten Polyatomic Ion Groups Acetate C2H3O2 -1 Bicarbonate HCO3 -1 Hydroxide OH -1 Nitrate NO3 -1 Nitrite NO2 -1 Carbonate CO3 -2 Sulfate SO4 -2 Sulfite SO3 -2 Phosphate PO4 -3 Ammonium NH4 +1