1. Lesson Three--Transition Metal Compounds
Concept:
Transition metals have electrons in d orbitals and can donate different numbers of electrons, thus giving them several different positive charges.
Fact 10:
These can be determined from the Roman numeral which is written next to the metal's name.
Example: Cu1+is Copper I
Pb2+is Lead II
Fe3+is Iron III
Sn4+s Tin IV

3. Transition Metal Compounds
Fact 11:
These transition metals are used in formulas just like other metals, once the charge is determined from the Roman numeral in the name.
Example: Cu1+ Cl Pb2+O2-
Fe3+Br Sn4+O2-

4. Transition Metal Compounds
Fact 11:
Roman numeral in the name.
Example:
Cu1+ Cl copper (I)
Pb2+O Lead
Fe3+Br Iron
Sn4+O2-

5. Transition Metal Compounds
Fact 12:
A few transition metal ions only have one charge and never change so they can be written without a Roman numeral in their formula name.
Example: Ag Zn2+ Cd2+

6. FeCl3 (Fe3+) iron (III) chloride
Names of Variable Ions
Use a roman number after the name of a metal that forms two or more ions
Transition metals and
the metals in groups 4A and 5A
FeCl3 (Fe3+) iron (III) chloride
CuCl (Cu+ ) copper (I) chloride
SnF (Sn4+) tin (IV) fluoride
PbCl (Pb2+) lead (II) chloride
Fe2S3 (Fe3+) iron (III) sulfide

7. Learning Check
Complete the names of the following binary compounds with variable metal ions:
FeBr2 iron (_____) bromide
Cu2O copper (_____) oxide
SnCl4 ___(_____ ) ______________
Fe2O3 ________________________
CuS _________________

8. Learning Check 3) cobalt trioxide Name the following compounds: A. CaO
1) calcium oxide 2) calcium(I) oxide
3) calcium (II) oxide
B. SnCl4
1) tin tetrachloride 2) tin(II) chloride
3) tin(IV) chloride
C. Co2O3
1) cobalt oxide ) cobalt (III) oxide
3) cobalt trioxide