1. Naming Compounds Involving Transition Metals and Polyatomic Ions

2. Transition Metals The transition metals and the metals to the right of them generally form more than one ion. We call these elements multivalent. The charges on the multivalent elements' ions are not always predictable, although some patterns do exist. Consequently, you won't be expected to predict these, although you will be expected to work with them.

3. Ionic Compounds Involving Transition Metals Roman numerals are used in the name of the transition metal in the compound to show the valence on the cation. Examples: Mn +4 = Manganese(IV) OR Mn +5 = Manganese(VI) Fe +2 = Iron(II) OR Fe Iron(III) Cu +1 = Copper(I) OR Cu +2 = Copper(II)

4. Examples of Transition Metals Iron(II) Iron(III) Copper(I) Copper(II) Manganese(II) Manganese(IV) Fe +2 Fe +3 Cu +1 Cu +2 Mn +2 Mn +4

5. Steps to Naming the Ionic Compounds 1. Separate the two elements-metal and non-metal 2. Add 1’s with the element that has no number 3. Cross-over from bottom to top 4. Add the charges-REMEMBER the first one (metal) is positive and the second (non-metal) is negative 5. Make sure the charges match those found on the Periodic Table **If they do not, MULTIPLY both charges with the same number to find the non-metals true charge. 6. Write the name-the metal stays the same, but the non-metal changes it’s ending to “ide”.

6. Let’s Practice! Name the ionic compound for Fe 2 O 3 PbO 2

7. Special Cations

8. Steps to Writing Chemical Formulas 1. Determine the metal and non-metal **Hint-the element with the roman numeral is the metal 2. Write the charges -Look at the roman numeral for the metal’s charge - Look at the Periodic Table for the non-metal’s charge 3. Cross over from top to bottom 4. Remove the charge and make each number a subscript 5. Simplify the numbers 6. Remove any 1’s 7. Rewrite using the element symbol and include the subscript

9. Let’s practice! Manganese (IV) Oxide Copper(II) phosphide

10. Polyatomic Ions Polyatomic (many atom) ions are covalent molecules with a charge. They behave as if they were a one-atom ion.

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14. Naming Compounds Involving Polyatomic Ions Polyatomic Ions can form ionic or covalent bonds. The polyatomic ion is always listed second. You DO NOT use the ending “ide”