1. Tuesday, January 6th, 2014 HW: Week 17 Agenda Problems
Objective: We will describe the formation, structure and physical properties of an ionic bond.
Catalyst:
F. Stacking blocks on top of one another does not improve heat flow.
G. Placing blocks next to one another does not improve heat flow.
H. Using blocks made of metal materials does improve heat flow.
J. Switching the temperatures on the plates does not improve heat flow.
Classroom expectations:
Wear Kenwood ID.
Cell phones, music players, and headphones are put away.
Food is disposed of or put away.
Dressed appropriately.
Notebook is out and you are ready for today’s class.
***Table of Contents
1/ Classwork/Notes: Properties of Ionic Compounds

2. Tuesday, January 6th, 2014 A. increased only.
HW: Week 17 Agenda Problems
Objective: We will describe the formation, structure and physical properties of an ionic bond.
Catalyst:
A. increased only.
B. increased, then stayed the same.
C. decreased only.
D. decreased, then stayed the same.
Classroom expectations:
Wear Kenwood ID.
Cell phones, music players, and headphones are put away.
Food is disposed of or put away.
Dressed appropriately.
Notebook is out and you are ready for today’s class.
***Table of Contents
1/ Classwork/Notes: Properties of Ionic Compounds

3. Announcements Tutoring this week: Wednesday and Thursday
Missed Unit 4 Exam?? MUST make-up by Thursday THIS WEEK.
Three week unit SEMESTER EXAMS!!!

4. Catalyst/Announcements Homework Check Notes: Ionic Compounds
Agenda
Catalyst/Announcements
Homework Check
Notes: Ionic Compounds

5. Agenda Problems Noble gases already have 8 valence electrons.
Anion is an ion with a negative charge and a cation is an ion with a positive charge. Anions gain electrons and cations lose electrons.
Atoms with high electronegativity and ionization energy form anions because they attract electrons easily.
Atoms with low electronegativity and ionization energy form cations because they lose electrons easily.
5a) 1 5b) 4 5c) 2 5d) 6 6a) lose 2 6b) gain 1 6c) lose 3 6d) gain 2

6. Ionic Compounds Notes
Pg.

7. Let’s Review
A compound is a substance with two or more atoms chemically bonded.
Three types of compounds are: metallic, ionic, and molecular.

8. Let’s Review
An ion is an atom that has lost or gain electrons.

9. Formation of Ionic Compounds
An ionic compound is formed when electrons are transferred between a cation and an anion.

10. Formation of Ionic Compounds
Anions (non-metals) and cations (metals) have opposite charges, and therefore attract to one another by electrostatic forces.
Lithium
Fluorine

11. Ionic Bonds
The electrostatic forces that hold ions together in ionic compounds are called ionic bonds.
Li+ F-
Ionic
Bond
Electron lost by Lithium
Electron gained by Fluorine

12. Example: Ionic BondingNa Cl
The cation (metal) tends to lose its electron from the outer level.
The anion (nonmetal) needs to gain more electron(s) to fill its outer level, and will accept the electron(s) the cation is going to lose.

13. Example: Ionic Bonding
Na+
Cl -
All ionic compounds are composed of a positive ion and a negative ion.
Ionic compounds are always electrically neutral, meaning their charges cancel out.
The result is an ionic compound with a NET CHARGE of zero.
1+ and 1- = zero
Formula = NaCl

14. Practice
Complete practice problem #5

15. Check for Understanding
Match the cation with the anion it will MOST likely form a bond with: Cation Anion Al3+ P3- Mg2+ Cl- K+ S2-
Formula = AlP
Formula = KCl
Formula = MgS

16. Ionic Bonding
What if the charges of each ion did NOT cancel one another out? (Remember NET CHARGE = 0) Mg2+ and Cl- 
(2) = 0 
MgCl2
Write the # after the ion as a subscript!!
= 0

17. Check for Understanding
Mg2+ and P3- Al3+ and O2- 
2+(3) + 3-(2) = 0 
Mg3P2 
3+(2) + 2-(3) = 0 
Al2O3

18. Properties of Ionic Compounds
1.) Most ionic compounds are crystalline solids at room temperature. Because of this structure ionic compounds are called salts.
Barite (BaSO4)
Aragonite (CaCO3)

19. Ionic Compounds
Most rocks, minerals and gemstones are ionic compounds.
Ceramics, bricks and kitchen crockery are made from clays which contain ionic compounds.

20. Properties of Ionic Compounds
2.) Unlike metals, ionic compounds are not malleable. They break when a force is applied.

21. Properties of Ionic Compounds
3.) Most ionic compounds have high melting and boiling points. *Example: Salt (NaCl) melts at 800°C.

22. Properties of Ionic Compounds
4.) Ionic compounds can conduct an electric current when melted or dissolved in water. *note: ionic compounds CANNOT conduct electricity in their solid state

23. - Page 198
The ions are free to move when they are molten (or in aqueous solution), and thus they are able to conduct the electric current.

24. Practice
Complete problems #6 and #7 with your elbow partner and check with Ms. Ingham once complete.