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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 ****if it sounds awkward…it is most likely wrong. Examples. CaCl 2

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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

****if it sounds awkward…it is most likely wrong.

examples
Examples

CaCl2

Mg(NO3)2

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 = Fe 3+Cl-

FeCl3 is iron 3+ so the name is

iron (III) chloride

common roman numeral metals
Common Roman Numeral Metals
  • Iron
  • Lead
  • Copper
  • Tin
  • Chromium
  • Nickel
  • Mercury
  • Cobalt
slide7
CuNO3

Copper(I) nitrate

worksheet
Worksheet

Fe2S3

iron(III) sulfide

slide9
CaBr2

calcium bromide