1. Important Information:
7.1 Practice Problems
Chapter 7 Vocabulary 1-10
Chapter 7 Notes: A-E
Activity: Naming Ionic Compounds due Wed
7.1 Reading Guide due Friday
Activity: Naming Molecular (Covalent) Compounds due Fri
7.1 Study Guide due Friday
7.2 Reading Guide due Monday

2. Section 7.1 Naming and Writing Formulas for Molecular Compounds
The prefix in the name of a binary molecular compound tells how many atoms of each element are present in each molecule of the compound.
p. 215

3. Section 7.1 Naming and Writing Formulas for Molecular Compounds
Molecular compounds are…
made of just nonmetals
smallest piece is a molecule
can’t be held together by opposite charge attraction
can’t use charges to figure out how many of each atom (there are no charges present)

4. Molecular compounds are easier!
Ionic compounds use charges to determine how many of each.
Molecular compounds: the name tells you the number of atoms.
prefixes tell you exact number of each element present!

5. D. Covalent Prefixes (Figure 1.4, p.216)
1 = mono- used only with oxygen when 2nd element
2 = di-
3 = tri-
4 = tetra-
5 = penta-
6 = hexa-
7 = hepta-
8 = octa-
9 = nona-
10 = deca-

6. E. Naming Molecular Compounds
1. confirm it is binary molecular compound (two nonmetals)
2. use subscripts to determine prefix
3. first element: prefix+name
4. second element: prefix+name with –ide suffix
Normally, we do not have double vowels when writing names (oa oo)
Prefix
+name
Prefix
+name +-ide
Ex: Cl2O8 di
chlorine
octa
oct
oxide

7. Practice by naming these:
N2O
NO2
Cl2O7
CBr4
CO2
BaCl2
= dinitrogen monoxide (also called nitrous oxide or laughing gas)
= nitrogen dioxide
= dichlorine heptoxide
= carbon tetrabromide
= carbon dioxide
(This one will not use prefixes, since it is an ionic compound!)

8. Write formulas for these:
diphosphorus pentoxide
tetraiodine nonoxide
sulfur hexafluoride
nitrogen trioxide
carbon tetrahydride
phosphorus trifluoride
dihydrogen monoxide

9. 7.1 Practice Problems p. 211: 1-2 p. 213: 1-2 p. 215: 1-2 p. 217: 1-2
Finish a set and turn to Appendix E page (R121) to check and correct your answers.. Self-correct.