1. Chapter 5-2 Warm - Up 1. What is a compound?
2. What is the difference between bond length and bond angle?
3. What are the 3 different types of models that represent molecules?
4. ________ are intermolecular attractions that occur between water molecules.

2. Chapter 5-2 The Structure of Matter
Ionic and Covalent Bonding

3. Bonding Bonded atoms usually have a stable electron configuration
Valence electrons interact
Structure similar to noble gases

4. Bonds
Bonds can be stretched without breaking
Flexible rubber bands

5. Ionic Bonds
Ionic Bond – formed by attraction between oppositely charged ions
Metal Elements – positive
Nonmetal Elements – negative
Network structure

7. Ionic Bonds Formed by the transfer of electrons
Instead of sharing outer most electrons they are transferred
Na+ ion and Cl- ion

8. Ionic Compounds
Ionic compounds are in the form of networks, not molecules
Na+ and Cl- form to make NaCl
1:1 Ratio for a zero charge
Ca2+ and F- form to make CaF2
1:2 Ratio for a zero charge

9. Ionic Compounds
When melted or dissolved in water ionic compounds conduct electricity
Electric current – moving charges

10. Metallic Bonds
Metallic Bond – formed by the attraction between positively charged metal ions and the electrons around them

11. Metallic Bond Atoms in metals
Atom’s nucleus and neighboring electrons packed tightly together
Electrons overlap and move freely
Conduct electricity

12. Covalent Bond
Covalent Bond – formed when atoms share one or more pairs of electrons
Compounds made of molecules
Low boiling point
Water and sugar
Nonmetals

13. Covalent Bond
Most of the molecules remain intact and do not conduct electricity
No charge

14. Lewis Dot Structure

18. A line shows atoms share 2 electrons

23. Triple Covalent Bond

24. Polyatomic Ions Polyatomic Ion – an ion made of 2 or more atoms
Both ionic and covalent bonds

25. Parentheses Group Polyatomic Ions
Ammonium Sulfate is written as:
(NH4)2SO4
Act like a single ion
2 ammonia ions
Carbonate ion:
CO32-
2- charge

26. Made of Oxygen -ite -ate The charge of each ion pair is the same.
One less oxygen atom
-ate
One more oxygen atom
The charge of each ion pair is the same.