(a.k.a. “Naming Chemical Compounds”) Nomenclature (a.k.a. “Naming Chemical Compounds”)

Part I: Naming Ionic Compounds

Steps to Naming an Ionic compound The name of the cation (metal) goes first Drop the suffix (last syllable) of the anion (nonmetal), and add –ide KBr = Potassium bromide CaO = Calcium oxide

Examples of Suffix Changes hydrogen = hydride carbon = carbide nitrogen = nitride oxygen = oxide sulfur = sulfide all halogens: -ine  -ide

Examples: CaCl2 Li2O Pt3N  How will the reader know the charge of platinum?

Steps to Naming an Ionic compound Transition Metals . . . Write a Roman numeral (ex. I, II, III, IV) with the number of the charge after the name of the metal (remember: transition metals can have more than 1) FeF2 = Iron(II) floride FeF3 = Iron(III) floride HgBr2 = Mercury(II) bromide

*Note: you can tell the charge of a transition metal by looking at its bonding partner AgCl AgCl2 Ag2O

Part II: Naming Compounds with Polyatomic Ions ( a.k.a. “ternary” compounds = 3 elements or more)

10 Polyatomic Ions to know Matching quiz next class! NH4+ ammonium NO3- nitrate SO4-2 sulfate OH- hydroxide PO4-3 phosphate CO3-2 carbonate C2H3O2- acetate MnO4- permanganate CrO4-2 chromate Add this one: SCN- thiocyanate

Steps to Name Compounds with Polyatomic Ions If the polyatomic ion is 1st (left) write polyatomic ion name first end name of second element to with –ide NH4F = Ammonium fluoride

Steps to Name Compounds with Polyatomic Ions If the polyatomic ion is 2nd (right) write metal name first write polyatomic ion name second BaSO4 = barium sulfate Ca(NO2)2 = calcium nitrite Fe(NO3)2 = iron(II) nitrate

Part III: Naming Covalent Compounds To be completed at a later date…

Steps to Name Covalent Compounds Name of the element that is more LEFT on the periodic table goes on the LEFT The name of the other element goes on the RIGHT and has -ide at the end Greek prefixes tell how many of each atom are present (Hint: mono is only used for oxygen)

Greek Prefixes: CO2 = carbon dioxide P3S4 = triphosphorus tetrasulfide *only for oxygen 1= mono- 2 = di- 3 = tri- 4 = tetra- 5 = penta- 6 = hexa- 7 = hepta- 8 = octa- 9 = nona- 10 = deca- Greek prefixes are used BEFORE the element name CO2 = carbon dioxide P3S4 = triphosphorus tetrasulfide

Examples: NO = CCl4 = N2S5 = H2 =