2. Types of Chemical Bonds  Ionic bonds are the electrostatic forces that exist between ions of opposite charges  They form between a metal and a nonmetal  Covalent bonds result from the sharing of one or more electrons between two atoms  They form between two nonmetals  Named “Molecular Compounds”

3. Molecular Compounds CH 4 methane BCl 3 boron trichloride CO 2 Carbon dioxide All are formed from two or more nonmetals. Ionic compounds generally involve a metal and nonmetal (NaCl)

4. Identify with contain covalent bonds 1.BaI 2 2.P 4 S 3 3.Ca(OH) 2 4.FeCO 3 5.Na 2 Cr 2 O 7 A.I 2 O 5 B.Cu(ClO 4 ) 2 C.CS 2 D.B 2 Cl 4 Ionic Covalent

5. Naming Molecular (Covalent) Nomenclature for two nonmetals Prefix System (binary compounds) 1.Less electronegative atom comes first (which ever is written first in the formula) 2.Add prefixes to indicate # of atoms. a.) Omit mono- prefix on the FIRST element. b.) Mono- is required on the SECOND element. 3.Change the ending of the second element to -ide.

6. Molecular Nomenclature Prefixes You need to memorize these. PREFIX mono- di- tri- tetra- penta- hexa- hepta- octa- nona- deca- NUMBER 1 2 3 4 5 6 7 8 9 10

7. CCl 4 carbon tetrachloride Molecular Nomenclature: Examples 1.Add prefixes to indicate # of atoms. 1.Monocarbon tetrachloride a.) Omit mono- prefix on the FIRST element. b.) Mono- is required on the SECOND element.

8. CCl 4 N 2 O SF 6 carbon tetrachloride dinitrogen monoxide sulfur hexafluoride Molecular Nomenclature: Examples

9. arsenic trichloride dinitrogen pentoxide tetraphosphorus decoxide AsCl 3 N 2 O 5 P 4 O 10 More Molecular Examples

10. Learning Check Fill in the blanks to complete the following names of covalent compounds. CO carbon ______oxide CO 2 carbon _______________ PCl 3 phosphorus _______chloride CCl 4 carbon ________chloride N 2 O_____nitrogen _____oxide mon dioxide tri tetra dimon

11. Learning Check 1.P 2 O 5 a) phosphorus oxide b) phosphorus pentoxide c) diphosphorus pentoxide 2.Cl 2 O 7 a) dichlorine heptoxide b) dichlorine oxide c) chlorine heptoxide 3. Cl 2 a) chlorine b) dichlorine c) dichloride

12. A flow chart for naming binary compounds.

13. Mixed Review Name the following compounds: 1. CaO a) calcium oxide b) calcium(I) oxide c) calcium (II) oxide 2. SnCl 4 a) tin tetrachloride b) tin(II) chloride c) tin(IV) chloride 3. N 2 O 3 a) nitrogen oxide b) dinitrogen trioxide c) nitrogen trioxide

14. Mixed Practice 1.Dinitrogen monoxide 2.Potassium sulfide 3.Copper (II) nitrate 4.Dichlorine heptoxide 5.Chromium (III) sulfate 6.Iron (III) sulfite 7.Calcium oxide 8.Barium carbonate 9.Iodine monochloride 1.BaI 2 2.P 4 S 3 3.Ca(OH) 2 4.FeCO 3 5.Na 2 Cr 2 O 7 6.I 2 O 5 7.Cu(ClO 4 ) 2 8.CS 2 9.B 2 Cl 4