Stock System.notebook
Cations with multiple charges
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January 17, 2011
Monoatomic Ions on p.205
Transition metals on the bottom table
Exceptions: Ag+ and Zn2+
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These ions only support one charge and do not ­
need a Roman numeral
p­block metals
Lead (II) (Pb2+) and Lead (IV) (Pb4+)
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Tin (II) (Sn2+) and Tin (IV) (Sn2+)
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Mostly transition metals
Some p­block metals
Use a Roman numeral to state the positive charge for the cation in the name.
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Examples:
FeCl2 iron (II) chloride
FeCl3
iron (III) chloride
Determining Formulas
How to determine the Roman numeral in the name.
Same process as monoatomic ion nomenclature.
Roman numeral tells to the charge of the cation.
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Example:
1.
Start with formula.
CuF2 2.
"Reverse cross over" subscritps.
Subscript becomes charge value
on opposite ion.
Cu2+ F­
3.
Value of the positive charge (cation) becomes the Roman
numeral in the name.
Iron (III) Chloride
Fe3+
Cl­
FeCl3
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Ionic Nomenclature
copper (II) fluoride
Identify the correct formula for chromium (II) oxide.
A
Cr2O
B
CrO2
C
Cr2O2
D
CrO
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Subject: «subject»
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Stock System.notebook
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Identify the correct formula for copper (I) oxide.
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What is the correct formula for lead (IV) sulfide?
A
CuO
A
PbS
B
Cu2O
B
Pb2S4
C
CuO2
C
PbS2
D
Cu2O2
D
Pb2S
What is the name of the compound with the formula Fe2O3?
A
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January 17, 2011
iron (II) oxide
B
iron (III) oxide
C
iron (IV) oxide
D
iron oxide (II)
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What is the name of the compound with the formula CrBr3?
A
chromium bromide
B
chromium bromide (III)
C
chromium tribromide
D
chromium (III) bromide
What is the name of the compound with the formula MnO2?
A
manganese oxide
B
managanese dioxide
C
manganese (II) oxide
D
manganese (IV) oxide
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