1. Ionic Bonds and Ionic Compounds

2. Properties of Ionic Compounds
Solids at room temperature
Atoms arranged in a 3D pattern
High melting points
Conduct an electric current when melted or dissolved in water
Fluorite
CaF2
Pyrite FeS2

3. Review
Compound: two or more elements chemically combined in a fixed ratio

4. Formation of Ionic Compounds
Composed of (non-metal) anions and (metal) cations
Example: Sodium Chloride

5. Formation Continued Electrically neutral
Metal gives their electrons to the non-metal creating an ionic bond

6. So What’s Happening?
Na Cl +1 +1
Na Cl
Cation
Anion
Opposites Attract

7. Ionic Bonds Want 8 valence/full outer shell Example: Sodium Chloride
Sodium: 1s22s2sp63s1  Na
Chlorine: 1s22s22p63s23p5  Cl

8. Practice: Hydrogen and Bromine

9. Practice: Potassium and Iodine

10. Practice: Magnesium and Oxygen

11. Practice: Hydrogen and Oxygen (you may need more than one of each type of atom)

12. Practice: Hydrogen and Carbon (you may need more than one of each type of atom)

13. Practice: Potassium and Nitrogen (you may need more than one of each type of atom)

14. Practice: Calcium and Sulfur (you may need more than one of each type of atom)

15. One of the following pairs will form an ionic bond, one won’t
One of the following pairs will form an ionic bond, one won’t. Draw out the one that will form the bond and describe why the other pair won’t bond.
Lithium and Magnesium
Zinc and Oxygen

16. Chemical Formula
A written representation of a substance using symbols for its elements
Subscripts
Show how many of each TYPE of atom are in the compound
Example: Water
H2O

17. Naming and Writing Formulas For Ionic Compounds

18. Binary Compound
Composed of two elements
Can be ionic or molecular

19. Chemical Formula for Ionic Compounds
Cinnabar
HgS
Chemical Formula for Ionic Compounds
Formula Units
Lowest whole-number ratio of the ions in a compound
Example:
Sodium Chloride
NaCl

20. Magnesium Chloride

21. Calcium Nitride

22. Naming Ionic Compounds
Cation FIRST
Keeps name of element
Anion SECOND
Add an –ide ending
Number of each element DOES NOT MATTER
Example: NaCl MgCl2
Sodium Chloride
Magnesium Chloride

23. Hand out Common Ion List

24. What’s Going On?!
Copper (i) Oxide
Copper (ii) Oxide

25. Is it Cu+1 or Cu+2?
CuS
Cu2S

26. Grab a whiteboard and let’s practice!

27. Chemical Formula Practice:
What is the formula for Aluminum Bromide?

28. Practice:
Predict the formula if Oxygen and Potassium form an ionic bond.

29. Practice:
Predict the formula if Copper(ii) and Nitrogen form and ionic bond.

30. One of the following pairs will form an ionic bond, one won’t
One of the following pairs will form an ionic bond, one won’t. Draw out the one that will form the bond and describe why the other pair won’t bond.
Argon and Oxygen
Barium and Carbon

31. Practice: Write the correct formula for the compounds formed from each pair of ions
Potassium and Sulfur
Calcium and Oxygen

32. Practice: Write the formulas for each compound
Barium Chloride
Lithium Oxide

33. Practice: Which pairs of elements are likely to form ionic compounds?
A. Cl and Br
B. Li and Cl
C. K and He
D. I and Na