1. Chemical Formula and Naming

2. Write formulas and names for polyatomic compounds. Additional KEY Terms

3. Octet rule: atoms react to get a full outer shell Ionic Compound: Ions are atoms that have reacted to gain or lose electrons Lose e - – positive ion OR cation. (metals) Gain e - – negative ion OR anion. (nonmetals) Bonding of two oppositely charged IONS.

4. calcium chloride Iron (II) chloride Fe Cl +- 1 2 FeCl 2 Ca Cl +- 1 2 CaCl 2

5. PbO +- 1 2 lead oxide(IV) +4-2

6. Covalent Compound: Contain two or more NON-METAL atoms. Molecule is smallest unit of covalent compound. Formed by SHARING valence electrons: Equally shared electrons – non-polar covalent Unequally shared electrons – polar covalent

7. PrefixNumber of Atoms mono1 di2 tri3 tetra4 penta5 hexa6 hepta7 octa8 nona9 deca10

8. nitrogen oxide N O di 24 tetra dinitrogen tetroxide Prefix Number of Atoms mono1 di2 tri3 tetra4 penta5 hexa6 phosphorus oxide P O di 2 5 penta

9. Polyatomic Ions (poly = many) Groups of covalently bonded atoms that act as ions. Polyatomic ions function as one unit with one charge – lose or gain electrons. NEVER change the subscripts of polyatomic ions. Al(C 2 H 3 O 2 ) 3

10. Write the name of the ionic compound: Al(C 2 H 3 O 2 ) Al C 2 H 3 O 2 +- 1 3 aluminum acetate

11. nickel (II) nitrate MgSO 4 potassium permanganate Fe(OH) 3 calcium acetate Ag 2 CrO 4 lead (II) carbonate Sn(SO 4 ) 2 sodium hydrogen phosphate NH 4 NO 2 1.Ni(NO 3 ) 2 2.magnesium sulfate 3.KMnO 4 4.iron (III) hydroxide 5.Ca(C 2 H 3 O 2 ) 2 6.silver chromate 7.PbCO 3 8.tin (IV) sulfate 9.Na 2 HPO 4 10.ammonium nitrite

12. CAN YOU / HAVE YOU? Write formulas and names for polyatomic compounds. Additional KEY Terms