1. Multivalent Ions
CuCl
CuCl2

2. Some of the metals —-The transition metals form different compound
eg. Cu1+ or Cu2+
Fe2+ or Fe3+
• These compounds that contain properties
• Each of these compounds need to be distinguished from each other
• The transition metals are elements that commonly have multiple valence shell electrons.

3. Example: Copper + Oxygen
Copper and oxygen could have two different formulas with two completely different properties.
Cu Cu1+
e.g CuO and Cu2O
In order to differentiate between the two, compounds use a different name to avoid confusion.

4. Naming Multivalent Ionic Compounds
Same as Ionic Binary but it indicates the metals charge in ROMAN NUMERAL
SnO2
 Sn4+O2-
 tin (IV) oxide
SnO
 Sn2+O2-
 tin (II) oxide
List the metal name first
After the metal name indicate the ion charge in brackets using roman numerals.
The non-metal has -ide suffix added.

5. Example 1 - Try yourself
Ni and O

6. Example 2 - Try yourself
Mn and P

7. Example 3 - Try yourself
Mo and Se