Name_______________
Ionic Compounds & Formula Writing
Date___________B____
Chemists use a
_________________ set of rules to write and name Ex. 1 Aluminum Nitride
compounds. Every ionic compounds must be electrically ___________,
meaning the total positive and negative charge is __________. It is also a
Cation
rule that the ___________ cation is written first and the ______________
Anion
Formula = ____________
anion second (element name changed to the _______ suffix).
A number in the _________ ________ of the element symbol tells us Ex. 2 Barium Chloride
______ _______ of those atoms there are in a compound. For example,
_____________ means that there are ____ Na atoms and ____ O atoms.
Cation
Anion
Formula = ____________
MONOATOMIC IONS Formula Writing Practice Problems:
Anions
Cations
Bromide
Sulfide
Nitride
Sodium
Barium
Gallium
Transition
have Ex. 3a Copper (II) Oxide
metals
Ex. 3b Chromium (III) Oxide
___________ ion charges that are
shown using roman numerals.
For
example,
____
is
called
_____________.
Cation
Anion
Formula = ____________
Cation
Anion
Formula = ______________
Practice Problems: Name the following using roman numerals to show charge and the “-ide” ending
1. CuCl
3. CrS
5. FeO
2. CuO
4.
CoF2
6. Fe2O3
Name_______________
Ionic Compounds & Formula Writing
Date___________B____
There are also many ______________________ ions (ex. Ex. 4
Sodium Phosphate
________________________________). These groups of atoms
form groups with their own special names and specific charges.
Polyatomic ions should be treated as a ___________ object or
Cation
Anion
Formula = _______________
group. The subscripts of a polyatomic ion can ______ be changed.
Practice Problems: Name the following using polyatomic ion names or the “-ide” ending
1. Na2CO3
3. BaSO4
5. Li3PO4
2. NH4OH
4. KNO3
Chemists use ________________ Ex. 5
6. NH4NO3
Strontium Nitrate
Ex. 6
Ammonium Sulfate
to show when there is more than
one polyatomic ion, for example
_______ means that there are
Cation
Anion
Cation
Formula = _______________
Anion
Formula = ______________
___________________.
POLYATOMIC IONS Formula Writing Practice Problems: use ( parentheses ) when needed
Anions
Cations
Potassium
Ammonium
Strontium
Aluminum
Hydroxide
Nitrate
Sulfate
Phosphate
Ionic Compounds & Formula Writing
Name_______________
Date___________B____
Practice Problems - Write the formula of each compound ( Write the ions first!)
1. Cesium Fluoride
Cation
5. Lithium Sulfide
Anion
9. Lithium Phosphate
Cation
Anion
Cation
Anion
Formula = _______________
Formula = _______________
Formula = _______________
2. Zinc (II) Oxide
6. Copper (II) Hydroxide
10. Ammonium Chloride
Cation
Anion
Cation
Anion
Cation
Anion
Formula = _______________
Formula = _______________
Formula = _______________
3. Sodium Carbonate
7. Aluminum Oxide
11. Cobalt (III) Nitrite
Cation
Anion
Cation
Anion
Cation
Anion
Formula = _______________
Formula = _______________
Formula = _______________
4. Barium Bromide
8. Silver (I) Nitrate
12. Francium Phosphite
Cation
Anion
Formula = _______________
Cation
Anion
Formula = _______________
Cation
Anion
Formula = _______________
MIXED REVIEW: Formula Writing with Monoatomic and Polyatomic Ions
Anions
Cations
Lithium
Magnesium
Aluminum
Iodide
Sulfide
Nitrate
Carbonate
Phosphate
Ionic Compounds & Formula Writing
Name_______________
Date___________B____
Practice Problems - Write the formula of each compound ( Write the ions first!)
1. Rubidium Iodide
Cation
4. Ammonium Hydroxide
Anion
Cation
Anion
7. Magnesium Nitrate
Cation
Anion
Formula = _______________
Formula = _______________
Formula = _______________
2. Gold (I) Chloride
5. Lead (II) Sulfide
8. Ammonium Carbonate
Cation
Anion
Cation
Anion
Cation
Anion
Formula = _______________
Formula = _______________
Formula = _______________
3. Barium Nitrate
6. Aluminum Sulfate
9. Silver (I) Cyanide
Cation
Anion
Cation
Formula = _______________
Anion
Formula = _______________
Cation
Anion
Formula = _______________
Name each of the following compounds:
** These examples have transition metals and need roman numerals in their names to show charge
1. CsF
2. MnCl2
6. Cu2SO4
**
3. Al2S3
4. Ni(OH)2
5. (NH4)3P
**
** 11. Al(NO3)3
7. NH4Cl
12. FePO4
**
8. K3PO4
13. Fe3(PO4)2
**
9. CsNO3
14. NaOH
10. CuCO3
** 15. (NH4)3PO4
Ionic Compounds & Formula Writing
Name_______________
Date___________B____
MORE MIXED REVIEW: Formula Writing with Monoatomic and Polyatomic Ions
Anions
Fluoride
Oxide
Hydroxide
Sulfate
Phosphite
(not Phosphate!)
Cations
Cesium
Ammonium
Strontium
Indium
MORE MIXED REVIEW: Formula Writing with Monoatomic and Polyatomic Ions
Anions
Cations
Lithium
Indium
Magnesium
Ammonium
Phosphide
Sulfite
(-ide, not -ate or -ite)
(-ite, not -ate or -ide)
Permanganate
Chlorate
Ionic Compounds & Formula Writing
Name_______________
Date___________B____
MORE MIXED REVIEW: Formula Writing with Monoatomic and Polyatomic Ions
Anions
Cations
Fluoride
Phosphite
Oxide
Acetate
Chromate
Aluminum
Cesium
Ammonium
Calcium
Practice Problems - Write the formula of each compound ( Write the ions first!)
1. Gallium Sulfide
Cation
4. Ammonium Sulfate
Anion
Cation
Anion
7. Barium Hydroxide
Cation
Anion
Formula = _______________
Formula = _______________
Formula = _______________
2. Gold (I) Cyanide
5. Lead (II) Nitrate
8. Ammonium Phosphate
Cation
Anion
Cation
Anion
Cation
Anion
Formula = _______________
Formula = _______________
Formula = _______________
3. Calcium Sulfate
6. Nickel (II) Hydroxide
9. Silver (I) Carbonate
Cation
Anion
Formula = _______________
Cation
Anion
Formula = _______________
Cation
Anion
Formula = _______________