1. NOMENCLATURE Binary Molecular Compounds Periodic Table

2. Ionic Vs. Covalent Ionic Metal/nonmetal Large differences in EN (>1.7) Transfer electrons Results in cations and anions Follows octet rule Covalent (Molecular) Nonmetals only EN differences <1.7 Share electrons No ions are formed, but sharing might not be equal all the time Follows octet rule

3. SO 3 Al 2 O 3 NaCl S 2 Cl 2 N2F2N2F2 CaF 2 Activity Binary Molecular CompoundBinary Ionic Compound

4. Prefix Chart mono1 di2 tri3 tetra4 penta5 hexa6 hepta7 octa8 nona9 deca10

5. Naming from the formula  Write the name of the first element.  Write the name of the second element.  Change the ending of the second element to "IDE"  Put the correct prefix in front of each element to tell how many atoms of that element are in the molecule. CarbonOxygen oxide di

6. Naming from the Formula Only use “mono” for the second element “ide” still only used for second element CO 2 = carbon dioxide; NOT monocarbon dioxide. H 2 O = dihydrogen monoxide

7. Try it SO 2 NH 3 N 2 H 4 CCl 4 NO

8. Naming the formula from the name: Dinitrogen monoxide  Write the symbol of the first element.  Write the symbol of the second element.  Use the prefix in the name to acquire the correct subscript. dinitrogen monoxide NO N2ON2O

9. Try it Diarsenic trioxide Phosphorus trichloride Sulfur dibromide Chlorine trifluoride Carbon monoxide

10. Assessment 1.Name the compound CCl 4 2. Name the compound CO 3.Write the formula for tetraphosphorus decaoxide 4.Write the formula for sulphur trioxide