molecular compounds.notebook
October 25, 2012
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molecular compounds.notebook
October 25, 2012
Writing formulas of molecular compounds is more complicated
because the same elements may form a number of different
compounds.
Nitrogen and Oxygen - N2 O
NO
N2 O3
NO2
N2 O5
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molecular compounds.notebook
October 25, 2012
Elements that form Diatomic Molecules
Name of Element Chemical Symbol
Formula Hydrogen
H
H2 (gas)
Oxygen
O
O2 (gas)
Nitrogen
N
N2 (gas)
Fluorine
F
F2 (gas)
Chlorine
Cl
Cl2 (gas)
Br
Bromine
Iodine
I
Br2 (liquid)
I2 (solid)
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molecular compounds.notebook
October 25, 2012
Remember the list of Diatomic
molecules using this mnemonic!
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molecular compounds.notebook
October 25, 2012
Naming Molecular Compounds
Step 1- Write the names of the elements from
right.
Example: CO 2
left to
Carbon Oxygen
Step 2- Replace the ending of element on the right with
"ide".
Example: Carbon Oxygen
Carbon Oxide
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molecular compounds.notebook
October 25, 2012
Naming Molecular Compounds
Step 3- Add the corresponding prefix to the element(s).
Example- Carbon Oxide
Carbon dioxide
Note: Don't use the prefix "mono" on
the first element
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molecular compounds.notebook
October 25, 2012
Example 3 - PCl3
Example 4- diboron hexahydride
Example 5 - nitrogen triiodide
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molecular compounds.notebook
October 25, 2012
Can you spot the right name?
Al2O3
Dialuminum trioxide
OR
Aluminum oxide
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molecular compounds.notebook
October 25, 2012
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