Chemical Compounds are described as either ________________ or ___________________________
Read pages 126 – 127 and fill in the blanks
Chemical compounds are described as either ___________ or ___________________.
Compounds can be divided into ______________________, based on the differences in their ________________.
These two type are called _____________ compounds and _____________________ compounds.
Ionic Compounds
_________ ions are _______________ charged and non-metal ions are ___________________ charged. Ionic
compounds form because the positively charged metal ions _________________________________________
charged non-metal ions.
Ionic compounds have the following properties:
* they are ____________ at _______________________________.
* they have a __________________________________ point.
* they conduct _____________________ when they are ______________ or __________________________.
2.2 Examples of Ionic Compounds and Their Uses
Chemical Formula
Chemical Name (common name)
Common use
Molecular Compounds (aka Covalent Compounds)
Non-metal atoms can __________________________ with other non-metal atoms including _________________.
Molecular compounds have the following properties:
* They may be ____________, _______________, or ___________ at room temperature
* They have ____________ melting points than ionic compounds
* They do not conduct ____________________________ when they are melted or __________________________,
except in the case of certain acids.
2.3 Examples of Molecular Compounds and Their Uses
Chemical Formula
Chemical Name (common name)
Common use
Do Activity 2.6 Ionic or Molecular? on page 127
Chemical Formula
Types (metal or non-metal)
Ionic or molecular
Naming a Molecular Compound from Its Chemical Formula
Read pages 130. Using the chart on pg.131, fill-in-the-blanks.
Step 1: Look at the formula of the molecular
compound: ______. Use the periodic table
to name the first element
C = ________________
Step 2: Choose the correct prefix for the
number of atoms of the element
carbon. There is only ____________ of carbon, so the correct prefix is
________. But ‘mono’ is not included for the first element.
Step 3: Use the periodic table to name the
second ________________
O = ________________
Step 4: Change the ending of the second
element to “ _____ “.
oxygen  ____________
Step 5: Choose the correct prefix for the
number of atoms ____________________.
2 = di  ______________
There are _______ atoms of oxygen, so the correct prefix is “di”.
Step. 6: Combine the ________________
of the name.
________________
Name these molecular compounds:
1. SO2
2. SO3
3. CCl4
_________________
4. PCl5
5. CO
Writing the Chemical Formula of a Molecular Compound from Its Name
Read page 132: Writing the Chemical Formula of a Molecular Compound from its name.
Step 1: Look at the name of the molecular
compound: ___________________________. Use the
periodic table to find the symbols for the elements.
Step 2: Compare the prefixes in the name to those in
Table 2.6 to determine the number of atoms of each
Element.
Step 3: Write in the __________________, and write
chemical formula.
nitrogen = _____
oxide = _______________ = O
di = ___
two nitrogen = _______
tetra = ____
four oxygen = ______
N__O__
dinitrogen tetroxide
N 2 O4
Write the chemical formula for the following molecular compounds:
a) sulfur difluoride
b) nitrogen monoxide
c) disulfur trioxide
d) disulfur difluoride
e) silicon tetrachloride
f) diphosphorus pentoxide
g) carbon disulfide
h) carbon tetraiodide