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Naming Ionic Compounds. 1) Name the cation (metal) This one is always first in the formula. 2) Name the anion (nonmetal) **if it is a polyatomic ion write the name **if it is a single element change ending to ide. Examples. CaCl 2 Calcium chloride Mg(NO 3 ) 2 Magnesium nitrate.

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slide2
1) Name the cation (metal)

This one is always first in the formula.

2) Name the anion (nonmetal)

**if it is a polyatomic ion write the name

**if it is a single element change ending to ide

examples
Examples

CaCl2

Calcium chloride

Mg(NO3)2

Magnesium nitrate

slide4
3) If the formula has a star by it, then it will have a Roman numeral.

To find the Roman numeral, undo the criss-cross. Go to the end of the formula and work backwards

examples1
Examples

FeCl3

Ask: where did that number, 3, come from?

FeCl3

(Work backwards, uncross numbers)

example: FeCl3 = Fe3+ Cl-

FeCl3 is iron 3+ so the name is

iron III chloride

slide6
CuNO3

Copper (I) nitrate

worksheet
Worksheet

Fe2S3

Fe+3 S-2

Iron III sulfide

slide8
CaBr2

Ca+2 Br-1

Calcium bromide