1. Bell Ringer
Atomic number tells the number of _________ and ________.
Draw an electron dot diagram for K (Potassium).
Draw an electron dot diagram for Br (Bromine).
What group is Br in? How many valence electrons does Br have?
The period tells the number of ______. The group tells the number of _______.
Tell me how many atoms are in this compound.
CaCl2
Ca = ___ Cl = ___

2. When atoms form ionic bonds, they transfer electrons.
Ionic Bonding
When atoms form ionic bonds, they transfer electrons.
Gaining electrons
Losing electrons

3. Electron Dot Diagrams
He 5. C
As 6. Al
K 7. Rn
Ba Pb

4. Ionic Bonding Examples
K F
2. Mg I
Be S
Na O
Al Br

5. Practice with Compounds
Magnesium Chloride = MgCl3
Mg = ___ Cl = ___
2. Rubbing Alcohol = C3H8O
C = ___ H = ___ O = ___
3. Zinc Chloride = ZnCl2
Zn = ___ Cl = ___
4. Aluminum Nitrate = Al(NO3)3
Al = ___ N = ___ O = ___
5. Six molecules of water = 6H2O
H = ___ O = ___

6. Example

7. Group 1
Alkali metals
1 valence e-
+ 1 charge
Group 2
Alkaline earth metals
2 valence e-
+ 2 charge
Group 13
Boron Fam.
3 valence e-
+3 charge
Group 14
Carbon Fa.
4 valence e-
+4/-4
Group 15
Nitrogen Fam.
5 valence e-
-3 charge
Group 16
Oxygen Fam
6 valence e-
-2 charge
Group 17
Halogens
7 valence e-
-1 charge
Group 18
Noble gases
8 valence e-
0 charge

9. Look at the charges at the top of the periodic table you just created.
What groups elements do you think would like to bond with each other based on their charges?
Look at the charges at the top of the periodic table you just created.

10. Groups 1 and 17
Groups 2 and 16
Groups 13 and 15
Those groups whose valence electrons add together to give you 8 (octet rule).

11. Crystal Lab

12. Clean Up W cup up front and pour it out in the sink
C cup on back table
Salt and Vinegar on side table
Magnifying Glasses up front
Clean your table with a wipe if it needs it
Part of your grade comes from cleaning up!!

13. Exit Quiz
Atomic number tells the number of _________ and ________.
Draw an electron dot diagram for Ca (Calcium).
What group is Ca in? How many valence electrons does Ca have?
The period tells the number of ______. The group tells the number of _______.
Tell me how many atoms are in this compound.
H2SO4
H = ___ S = ___ O = ___