1. Section 3: Transition Metal Ions

2. Some transition metals form more than one cation with different charges
ex – Iron can form two different cations:
Fe2+ - Iron (II)
Fe3+ - Iron (III)

3. Group 14 metals also form multiple cations
Tin can form two different cations:
Sn2+ - tin (II)
Sn4+ - tin (IV)
Lead can form two different cations:
Pb2+ - lead (II)
Pb4+ - lead (IV)

4. Ion Charges Zinc is always Zn2+ ; silver is always Ag+ 1 1A 18 8A H+ 213 3A 14 4A 15 5A 16 6A 17 7A
Li+
Be2+
N3-
O2- F- 3
Na+
Mg2+ 4 5 6 7 8 9 10 11 12
Al3+
P3-
S2-
Cl- K+
Ca2+
Ti4+
Ti3+
V5+
V4+
Cr3+
Cr2+
Mn2+
Mn4+
Fe3+
Fe2+
Co2+
Co3+
Ni2+
Ni3+
Cu2+
Cu+
Zn2+
Ga3+
Ge+4
As3-
Se2-
Br-
Rb+
Sr2+
Pd2+
Pd4+
Ag+
In3+
Sn2+
Sn4+
Te2- I-
Cs+
Ba2+
Pt4+
Pt2+
Au3+
Au+
Hg2+
Hg+
Pb2+
Pb4+
At-
Fr+
Ra2+
Zinc is always Zn2+ ; silver is always Ag+

5. Writing Ionic Compound Formulas
Example: Iron(III) chloride
Write the formulas for the cation and anion,
including CHARGES!
2. Balance charges, if necessary, using subscripts.
(crisscross charges)
Fe3+
Cl-

6. Writing Ionic Compound Formulas
Example: Iron(III) chloride
Write the formulas for the cation and anion,
including CHARGES!
2. Balance charges, if necessary, using subscripts.
(crisscross charges)
3. Erase charges.
FeCl3

7. Writing Ionic Compound Formulas
Example: lead (IV) nitride
Write the formulas for the cation and anion,
including CHARGES!
2. Balance charges, if necessary, using subscripts.
(crisscross charges)
Pb4+
N3-

8. Writing Ionic Compound Formulas
Example: lead (IV) nitride
Write the formulas for the cation and anion,
including CHARGES!
2. Balance charges, if necessary, using subscripts.
(crisscross charges)
3. Erase charges.
Pb3N4

9. Naming Ionic Compounds
For metals that form more than one cation, use a Roman numeral in the name
Ex 1 – Write the chemical name for PbCl2
Pb2+ or Pb+4?
lead (II) chloride

10. Naming Ionic Compounds
For metals that form more than one cation, use a Roman numeral in the name
Ex 2 – Write the name for Cu3P
Cu+ or Cu2+ ?
copper (I) phosphide

11. Naming Ionic Compounds
For metals that form more than one cation, use a Roman numeral in the name
Ex 3 – Write the name for CrO
Cr2+ or Cr3+ ?
Chromium (II) oxide