1. jokes Q: What is the show cesium and iodine love watching together?
A: CSI
Q: Anyone know any jokes about sodium?
A: Na
Q: Did you hear how the date with oxygen and potassium went?
A: It went OK

2. Ions
C.3-S.C. 1-I will be able to find the charge/oxidation number for multiple elements.

3. What is an Ion? An Ion is a charged atom.
Every element on the periodic table wants to have a full outer shell.

4. How can an Atom Become Charged?
THE ONLY WAY AN ATOM CAN BECOME CHARGED IS IF IT GAINS OR LOSES ELECTRONS!!
Remember Protons and Neutron are found tightly packed in the nucleus.
Also if you change the number of protons an atom has you completely change the element itself.

5. Metals
They are found on the left side of the periodic table therefore they need to lose electrons to become stable
Positive Ions are called cations

6. Non-Metals
Non-metals are found on the right side of the periodic table therefore they need to gain electrons to become stable.
Negative ions are called anions

7. Finding the charge
Find the charge for the following Ions
Na Cl Al Ne

8. C.3-S.C. 3-I can draw Lewis diagrams to show ionic bonding
Ionic Compounds
C.3-S.C. 3-I can draw Lewis diagrams to show ionic bonding

9. Opposites Attract!!! Ionic Compounds
Bonds which occur between a metal and a non-metal.
Opposites Attract!!!

10. Drawing ionic compounds
We can use Lewis diagrams to show how ionic bonds form. The objective is to balance the number of electrons the metal gives up with the number of electrons the non-metal gains.
Ex. Sodium and chlorine
Ex. Magnesium and nitrogen

11. Naming and Finding the formula for ionic compounds.
C.2-S.C. 2-I will be able to name and find the formula for ionic compounds.

12. Review: Drawing ionic compounds
lithium and oxygen
Formula
It is much easier to find the formula for ionic compounds. Lets check it out….

13. Writing the Formula for an Ionic Compound
5 step rule
Write the symbol of the metal and its charge.
Write the symbol of the non-metal and its charge.
Criss-cross the ionic charges
Remove all the “+” and “- ” charges, as well as the 1’s.
Reduce if possible
Ex. lithium and oxygen

14. Lets try a couple… 1. Barium and Fluorine 2. Aluminum and Phosphorus
3. Sodium and Arsenic

15. Naming Ionic Compounds
3 step rule
Write the full name of the metal first
Write the prefix of the non-metal.
Add the ending “ide”
Ex. LiCl

16. Lets try a couple…
1. Al2O3
2. BaS
3. K2O
4. Ca2C

17. Bonding with classmates…