Monatomic Ions Ions formed from a single atom Written as (E 2+ ) or (E 2- ) Change ending to -ide

Binary Ionic Compounds Metallic or positive element is named first (cation) Non-metallic or negative element is named second (anion) Cross over charges Metal doesn’t change Non-metal suffix changes to -ide

Balancing Charges

Binary Ionic Compounds (Type II) Many elements may form more than one type of positive ion EX – FeCl 2 is named iron(II) chloride FeCl 3 is named iron(III) chloride OLD SCHOOL NAMING Higher oxidation number uses -ic ending (ferric chloride, Fe 3+ ) Lower oxidation number uses -ous ending (ferrous chloride, Fe 2+ )

Binary Ionic Compounds con’t Stock System uses Roman numerals to indicate charge Oxidation number in Roman numerals in parenthesis between cation and anion

Binary Covalent Compounds Formed between two non- metals 1.Name first element first 2.Name second like its an anion 3.Use prefixes to indicate number of atoms of element 4.Don’t use mono on first name

Prefixes Mono– 1 Di– 2 Tri- 3 Tetra- 4 Penta- 5 Hexa- 6 Hepta- 7 Octa- 8 Nona- 9 Deca- 10

Binary Acids Hydrogen takes place of metal ion Use prefix -hydro in place of hydrogen Use suffix -ic on the root Examples – HCl – hydrochloric acid HF – hydroflouric acid H 2 S – hydrosulfuric acid

Polyatomic Ions Group of atoms with a shared charge Most common form of ion ends with –ate If one less oxygen, ending changes to –ite Ex – NO 3 - (nitrate) NO 2 - (nitrite)

Common Polyatomic Ions

Oxyacids contain hydrogen, a non-metal, and oxygen usually contain 3 or 4 oxygen atoms add suffix -ic to the stem Examples – HBrO 3 – bromic acid H 2 CO 3 – carbonic acid HClO 3 – chloric acid HNO 3 – nitric acid H 3 PO 4 – phosphoric acid H 2 SO 4 – sulfuric acid

Oxyacids con’t Common name ends with -ate One extra oxygen add per- to stem name Example – HClO 3 – chloric acid HClO 4 – perchloric acid One less oxygen change -ic ending to -ous Example – HClO 3 – chloric acid HClO 2 – chlorous acid

Oxyacids con’t Two fewer oxygens change -ic ending to -ous AND add prefix hypo- Examples - HClO 3 – chloric acid HClO – hypochlorous acid