1. Describe a covalent bond. Identify the parts of a covalent compound diagram. Draw a stick diagram of a covalent compound. Name the following ionic compounds: 02/03/2015 1.Ni 2 CO 3 2.Fe(SO 3 ) 2 3.FeBr 3 4.K 2 SO 4

2. Reminders Polyatomic QUIZ - Monday

3. Remember… Ionic bond – Bond formed by the transfer of electrons – Between a metal and nonmetal K Cl CationAnion 1+ 1-

4. Covalent Bond Covalent bond – Bond formed by the sharing of valence electrons – Between 2 or more nonmetal elements – Atoms will share electrons so that they obtain 8 electrons in their outermost orbital.

5. 7 valence electrons

6. 8 valence electrons

8. Remember Lewis Dots… Draw Lewis dots for the following atoms… ONFHC 657 1 4

9. Covalent Compound Diagrams Diagrams that show how atoms in a molecule are covalently bonded together Every line = 2 electrons being shared

10. Parts of Covalent Compound Diagram Central Atom

11. Parts of Covalent Compound Diagram Single Bond

12. Parts of Covalent Compound Diagram Lone Pair

13. Steps to Drawing Diagram Step 1: Arrange the atoms into a skeleton structure. a.least electronegative element goes in the center b.Hydrogen goes on the outside. c.Carbon goes in the center.

14. Example 2: AsCl 3 As Cl

15. Steps to Drawing Diagram Step 2: Draw the _______ _____ diagram for each atom. Lewis dot

16. Example 3: AsCl 3 As Cl

17. Part 2: Steps to Drawing Diagram Step 3: Draw a line to connect the single electrons between the central atom and the surrounding atoms. a.Each line represents 2 electrons being shared.

18. Example 4: AsCl 3 As Cl

19. Example 5: AsCl 3 As Cl

20. Steps to Drawing Diagram Step 4: Count to make sure all valence electrons are accounted for in the diagram. Step 5: Check to make sure all atoms satisfy the octet rule. a.If needed, more than 2 electrons may be shared between 2 atoms.

21. As Cl Example 6: AsCl 3 8 valence