1. Ionic Compounds
Unit 6: Nomenclature

2. How do I name an ionic compound?
Lesson Essential Questions:
How do I name an ionic compound?
How do I write a formula for an ionic compound?

3. Writing Names of Binary Ionic Compounds
Ex. BaO
Writing Names of Binary Ionic Compounds
Barium
Oxide
1. Write the Name of the first element (cation) as is.
You know it is a Binary Ionic Compound because it contains two (Bi) elements and one element is a metal and the other is a nonmetal.
2. Change the ending of the second element (anion) to –ide.

4. Writing Names of Binary Ionic Compounds
Ex. MgI2
Writing Names of Binary Ionic Compounds
Magnesium
Iodide
1. Write the Name of the first element (cation) as is.
2. Change the ending of the second element (anion) to –ide.

5. Writing Names of Ionic Compounds with Polyatomic Ions
Ex. MgIO3
Magnesium
Iodate
1. Write the Name of the first element (cation) as is.
You know it is a Polyatomic Ionic Compound because it contains more than two elements.
2. Write the name of the anion.

6. Writing Names of Ionic Compounds with Polyatomic Ions
Ex. NH4IO3
Ammonium
Iodate
1. Write the Name of the first element (cation) as is.
You know it is a Polyatomic Ionic Compound because it contains more than two elements.
2. Write the name of the anion.

7. Writing Ionic Formulas
Ex. Sodium Iodide
Write the formula for the anion and cation including the charges.
2. Check to see if the charges are balanced.
+1-1= Net charge of zero which means it is balanced.
Na+1
I-1

8. Writing Ionic Formulas
Ex. Barium Chloride
Write the formula for the anion and cation including the charges.
2. Check to see if the charges are balanced.
+2-1= Net charge of +1 which means it is NOT balanced and will need a subscript.
Ba+2
BaCl2
Cl-1
Not Balanced

9. What does the subscript mean?
In review: remember Barium has 2 valence e-
and chlorine has 7 valence e-
Since Barium has two bonding sites it can have two anions bonded to it becoming…. Ba Cl
BaCl2

10. Writing Ionic Formulas
Another way of writing a formula is by
crisscrossing the charges.
BaCl2 Ba +2 Cl -1 1 2

11. Writing Ionic Formulas
Ex. Barium Nitrate
Write the formula for the anion and cation including the charges.
2. Check to see if the charges are balanced.
+2-1= Net charge of +1 which means it is NOT balanced and will need a subscript and parenthesis.
Ba+2
Ba(NO3)2
NO3-1 2
Not Balanced

12. Writing Ionic Formulas
Ex. Ammonium Sulfate
Write the formula for the anion and cation including the charges.
2. Check to see if the charges are balanced.
+1-2= Net charge of -1 which means it is NOT balanced and will need a subscript and parenthesis.
NH4+1
SO4-2
(NH4)2SO4 2
Not Balanced

13. Writing Ionic Formulas
Ex. Ammonium Sulfate
Write the formula for the anion and cation including the charges.
2. Check to see if the charges are balanced.
+1-2= Net charge of -1 which means it is NOT balanced and will need a subscript and parenthesis.
NH4+1
SO4-2
(NH4)2SO4 2
Not Balanced

14. Writing Ionic Formulas
Ex. Magnesium Carbonate
Write the formula for the anion and cation including the charges.
2. Check to see if the charges are balanced.
Mg+2
MgCO3
CO3-2
They are Balanced