1. Study your notes! Quiz Ch.8 Write the formula and name the following: 1.Ca + Se  2.Sr + Br  3.Al + P  Write the formula from the name: 4.Chromium(III)oxide 5.Cesium iodide

2. Naming Ternary Ionic Compounds Na + NO 3  NaNO 3 Sodium nitrate How? (use the handout!)

3. Polyatomic Ions (many atom ions) Polyatomic ions are covalently bonded atoms with a collective charge. EX:.. H+ HN H + H +  H N H H NH 4 + is the ammonium ion ( +1 charge)

4. Review the List of Polyatomic Ions Treat a Polyatomic ion as a Single ion; don’t break it up !! Treat a Polyatomic ion as a Single ion; don’t break it up !! You know some of these ions by name. You know some of these ions by name. Nitrates (NO 3 - ) Nitrites (NO 2 - ) Phosphates ( PO 4 -3 )

5. Writing Formulas w/Polyatomics Li + CO 3 -2  Li 2 CO 3 Li + CO 3 -2  Li 2 CO 3 Mg + PO 4 -3  Mg 3 (PO 4 ) 2 Mg + PO 4 -3  Mg 3 (PO 4 ) 2 NH 4 + Cl  NH 4 Cl NH 4 + Cl  NH 4 ClNAMES!! Lithium carbonate Magnesium phosphate Ammonium chloride

6. The Rules for Ternaries (very easy!!) Write the correct formula Write the name of the Cation first Write the full name for the Anion second That’s it !! Al + SO 4 -2  Al +3 + SO 4 -2 Al 2 (SO 4 ) 3 * use parens ( ) if you need more than 1 ion! Aluminum sulfate

7. You have 5 min to review notes from last class. Write the formulas for : 1. Ca + N  2. Al + SO 3 -2  3. Mg + phosphate  Write the names for the above. Write the formula for: 1. Magnesium carbonate 2. Nickel(II)sulfate

8. Naming Covalent Compounds ( really easy) CO 2 COP 2 O 4 SO 3 carbon carbon diphosphorous sulfur dioxide monoxide tetraoxide trioxide Covalent Compounds consist of two non-metals!! There are no charges to balance because no electrons are lost or gained. So, how do you get the ratios? Know the prefixes

9. Prefixes: only for Covalent Cmpds. Non-metal, Non-metal combinations Mono1 Di2 Tri3 Tetra4 Penta5 Hexa6 Hepta7 Octa8 Nona9 Deca 10

10. Try These !! Name the following: PO 4 NO 2 NO 3 N 2 O 3 P 2 O 5 SiO 2 Write the formula: Sulfur trioxide Boron dioxide Dinitrogen pentoxide Carbon monoxide Carbon tetrachloride

11. Handout !!