Naming Compounds Tutorial And Worksheet With Answers Page 14
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20Writing the Names of Ionic Compounds
Example: Write the name for CuF
2
1)
Write the cation name first, then name the anion.
•
monoatomic anions use the “ide” suffix
copper fluoride
2) If the cation is one of the transition metals with various charges, write the charge using
parenthesis and Roman numerals after the metal name.
copper(?) fluoride
•
We must figure out what the charge is on the copper, we can deduce the charge
on the transition metal cations from the charge on the anions
•
Recall that the total charge for any compound must equal zero.
•
Since there are two bromides, each with a charge of (1-) and there is only
one copper, we can conclude that the charge on the copper must be (2+).
•
You can think of this as the reverse-criss-cross! See chapter 3
notes for more details.
copper(II) fluoride
write the charge in parenthesis in
Roman numerals after the cation name
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