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

3. 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

4. Balancing Charges

5. 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+ )

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

7. 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

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

9. 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

10. 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)

11. Common Polyatomic Ions

12. 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

13. 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

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