1. Multivalent Metals

2. Multivalent Metals
Multivalent metals have more than one ion charge listed on the periodic table.

3. Naming Ionic Compounds with Multivalent Metals
When naming ionic compounds that contain a multivalent metal, you need to designate which ion it is by including a roman numeral after the metal to indicate the charge
Roman numeral:
+1 – I
+2 – II
+3 – III
+4 – IV
+5 – V
For example, copper can form ions with a +1 or +2 charge.
Cu1+ = copper (I) (pronounced “copper one”)
Cu2+ = copper (II) (pronounced “copper two”)

4. Name Cu3N

5. Practice
Name the following:
SnS2
Fe2O3
FeF3
Cr3P2
Hg2O

6. Writing Chemical Formula for Ionic Compounds with Multivalent Metals
Similar to the steps of Binary Ionic Compounds
The charge of the metal is the roman numeral
Example:
Iron (II) chloride

7. Practice Determine the chemical formula for the following chemical:
Copper (I) fluoride
Lead (II) bromide
Nickel (III) selenide
Tin (II) oxide
Chromium (VI) oxide