4.2 Representing Molecular Compounds (Page 152)
Name:____________________________
_________________________ are usually composed of two or more different _____________________.
The elements within a molecular compound __________________________.
A water molecule with ________ and hydrogen molecules sharing electrons
Draw the Lewis structure for this molecular compound below:
Molecular compounds feature ________________________ between ____________________ and are often
referred to as _________________________________.
Molecules are __________________ particles composed of ____________________ atoms joined together.
Diatomic Molecules -
Naming Binary Molecular Compounds
A binary molecular compound is composed of _________________ joined by one or more covalent bonds.
__________________ indicate the _________________ of atoms of
each element in a molecule of the compound.
Things to know prior to naming:
Step 1: Use prefixes to indicate the number of both atoms in the compound (given in the chemical formula)
Step 2: The name of the second element ends in –ide. *Write the elements in order of how the appear in the
chemical formula*
Example 1: Name SO3
Example 2: Name N2O4
Writing Chemical Formulas for Molecular Compounds
Example: Write the chemical formula for disulfur dinitride
Step 1: Write down the symbol of the elements with the subscripts indicated by the prefixes.
Note:
(A simplified ratio can result in a different molecular compound. For example, NO2 and N2O4 are different
compounds!)
Common names of molecular compounds
Practice:
Name each of the following compounds.
a) BrF
__________________________
b) NO
__________________________
c) CO2
__________________________
d) SO3
__________________________
e) As2O3
__________________________
f) PBr5
g) Br2O
h) P2O3
i) CO
j) P4O10
__________________________
__________________________
__________________________
__________________________
__________________________
Write the chemical formula for each of the following compounds.
a) Iodine monofluoride
_____________
f) carbon tetrafluoroide
b) Arsenic trichloride
_____________
g) hydrogen chloride
c) sulfur dioxide
_____________
h) dichlorine monoxide
d) phosphorus pentabromide _____________
i) dichlorine pentoxide
e) nitrogen trichloride
_____________
j) sulfur hexafluoride
Homework
Read Pages 152-158 and Answer Q’s 1-3, 6 on Page 158
Read Pages 159-168 and Answer Q’s 1, 3, 5, 6 on Page 168
_____________
_____________
_____________
_____________
_____________