1. charges vary but always +1+ 2+ 3+ 3– 2– 1–
transition
metals
charges vary but always +

2. charges vary but always +
Transition Metal Ions
charges vary but always +

3. Fe2+ or Fe3+ 1s2 2s2 2p6 3s2 3p6 4s2 3d6 1s2 2s2 2p6 3s2 3p6 3d6 1s2
Write the electron configuration for iron (Fe):
1s2
2s2
2p6
3s2
3p6
4s2
3d6
How many valence e–’s in iron(Fe)? 2
What charge will an Fe ion have?
Fe2+ or
Fe3+
1s2
2s2
2p6
3s2
3p6
3d6
1s2
2s2
2p6
3s2
3p6
3d5
nucleus

4. Write the electron configuration for zinc (Zn):
1s2
2s2
2p6
3s2
3p6
4s2
3d10
How many valence e–’s in zinc (Zn)? 2
What charge will an Zn ion have?
Zn2+
1s2
2s2
2p6
3s2
3p6
3d10
nucleus

5. Sn F Sn S SnS2 SnF2 2+ – 4+ 2– Transition metals use a Roman numeral
tin(IV) sulfide
is used in glazes for porcelain fixtures.
tin(II) fluoride
is added to toothpastes to prevent cavities.
SnS2
SnF2
Tin(II) fluoride and tin(IV) sulfide have different compositions and uses. a) Tin(II) fluoride is added to toothpastes to prevent cavities. b) Tin(IV) sulfide is used in glazes for porcelain fixtures and dishes. Inferring What are the charges on the tin ions in the two compounds?
Transition metals
use a Roman numeral
in ( ) to show the charge.

6. Quick Quiz!
1. When metals from groups 1A, 2A, and 3A form cations, the charge on the ion is equal to…
8 minus the group number.
the group number minus 8.
the period number.
the group number.

7. Quick Quiz.
2. What is the correct name for this ion? Cu2+
copper ion
copper II ion
copper(II) ion
copper(2+) ion

8. Quick Quiz.
3. What is the correct symbol for the lead(IV) ion?
Pb5–
Pb4–
Pb5+
Pb4+

9. Quick Quiz.
4. What is the formula for iron(II) iodide?
Fe2I
FeI2
Fe2I2
FeI

10. Quick Quiz.
5. The correct name for CrCl3 is ________.
chromium chloride.
chromium(I) chloride.
chromium trichloride.
chromium(III) chloride.