1. Chapter 8: Covalent Bonding
Section 1: Molecular Compounds

2. Molecules and Molecular Compounds
Only ______ _______ exist as atoms
Ionic compounds
Electrons are ____________
Electrostatic forces (+/-)
Similar ______________
Molecular compounds
Electrons are _____________
Covalent bond- atoms share same electrons
Properties ________ greatly
Ex. H2O, HCl, CO2

3. Molecules and Molecular Compounds
Group of atoms joined by ________ _______
Charge is _________
Diatomic Molecule
Molecule of _______ _______
Ex: O2, Cl2, CO

4. Molecules and Molecular Compounds
Compound composed of _____________
Molecules of one compound are _________
Ex: all molecules of carbon monoxide (CO) are exactly the same
Form from 2 or more ______________
Relatively ______ melting and boiling points
________or _________ at room temperature

5. Ionic Compound vs. Molecular Compound
Formula Unit
Molecule

6. Practice MgBr2 C6H12O6 High melting temperature
Ionic Compound or Molecular Compound?
MgBr2
C6H12O6
High melting temperature
Gas at room temperature
Conducts electricity

7. Molecular Formulas H2O CO
_________ and _________ of atoms present in a molecule of a compound
Not necessarily the ________ ______ _______ ratio
Actual number of _________ in the molecule
Examples:
H2O CO
No number shown, assume it means 1
1 carbon atom
1 oxygen atom
Number of hydrogen atoms

8. Practice How many of each type of atom present in the
the following molecular compounds?
NH3
CO2
H2O2
C6H12O6
CHO

9. Molecular Formulas
Do not tell the ________ of a molecule, only the _______ and ______ of atoms.
Text pg. 215
Ex: H2O

10. Br2, CH4, SO3, N2H2, Ne2, KBr Do any of the above not exist?
Which of the above represent molecules?
Which of the above represent compounds?
Identify each as an Ionic Compound or Molecular Compound.