1. Warm-Up 12/10/13 Name the following ionic compounds Fe2O3 CaCl2
Be(NO3)2
Warm-Up 12/10/13

2. Covalent Bonding
12/10/13

3. Review: Two Main Types Covalent Nonmetal-Nonmetal
Ionic
Nonmetal-Nonmetal
Electrons are shared because all atoms involved are electron acceptors (takers)
Ex) CO2 or H2O2
Metal-Nonmetal
Complete electron transfer from the metal (donator) to the nonmetal (acceptor)
Ex) NaCl or Fe2O3
Review: Two Main Types

4. There is not complete electron transfer—can not model this in the same way.
We have to show what atoms are sharing electrons (bonding together) to reach a Noble Gas Configuration.

5. Covalent Bonding & Lewis Structures

6. Rules for writing Covalent compound Lewis structures (Molecules)
Example NH3

7. Example: Water

8. Your Job! Work on the Loopy Dot Diagrams Activity
DO NOT eat the dirty fruit loops. You can eat some fresh ones tomorrow.
Clean up your spot for the next hour!
We will have a few minutes to wrap up tomorrow.

10. Warm-Up 12/11/13 (NH4)2S AuP Sr3N2
More naming practice! Name the following ionic compounds. You may use the flow chart to help you!
(NH4)2S
AuP
Sr3N2

11. Making Lewis Structures (without Fruit Loops)
Wednesday 12/11/13
Making Lewis Structures (without Fruit Loops)

12. Things to Remember
The goal of bonding is to obtain a “Noble Gas Configuration.”
For most atoms, this means having 8 valence electrons.
Covalent compounds do this through sharing electrons, which we show using Lewis Structures.

13. 3 Easy Steps for Making Lewis Structures…

14. 1.Sum the valence electrons from all the atoms in the molecule.
-Do not worry about which electron comes from which atom.

15. Example: PCl3
Sum the valence electrons

16. 2.Use a pair of electrons in the form of a line to show a bond between each pair of atoms.
-The center atom is usually by itself in the formula. It also needs to form a lot of bonds to meet the Octet Rule.

17. Example: PCl3 Set up the “skeleton” structure
If a line means 2 electrons, how many have we already put in the Lewis structure?

18. 3.Arrange the remaining electrons to
satisfy the “duet rule” for Hydrogen
and the octet rule for other elements.
-Note: C, N, O, and F will never violate
the octet rule; other elements can.
-If an atom violates the Octet Rule,
it usually is the central atom.

19. Example: PCl3
Fill in the remaining valence electrons

20. Double or Triple Bonds
Some atoms will share more than just one electron with another atom
Double bond: total of 4 electrons between two atoms
Triple Bond: total of 6 electrons between two atoms

22. Your Job Turn in the Loopy Dot Diagram worksheet
Complete the Lewis Dot Structures Practice Problems (DUE Friday)
QUIZ: Monday 12/16
TEST: Thursday 12/19