Section 3: Transition Metal Ions www.lab-initio.com

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

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)

Ion Charges Zinc is always Zn2+ ; silver is always Ag+ 1 1A 18 8A H+ 2 13 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+

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-

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

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-

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

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

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

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