Naming Ionic Compounds with Transition Metals

When naming ionic compounds with transition metals, what do the names normally have in them?

• Roman numerals

• Arabic Numbers

• The valence electron number

• The group number

What is the yellow part on the periodic table called?

• Transition metals

• alkaline earth metals

• Halogens

• alkali metals

Why are transition metals unique?

• They can make multiple ions with different charges

• Their charges are not predictable and therefore we cannot name them

• They follow the same charge as their group number

• The contain silver and gold, which are the best elements

If the compound winds up containing an iron ion that has a +3 charge, what would the name be?

• Iron (III) Chloride

• Iron 3 Chloride

• Iron 2 Chloride

• Iron (III) Chloride

We know Cl has a 1- charge. Which other element would have a 1- charge?

• F

• Si

• S

• Ar

Iron (III) Chloride's chemical formula was FeCl₃

What would the correct name be for an ionic compound with the chemical formula Fe₂O₃?

• iron (III) oxide

• Iron (II) oxide (III)

• iron (II) oxide

• Iron oxide

Answer explanation

It's iron (III) oxide because you had to criss cross the charges to get the formula! Therefore, the subscript of oxygen (3) tells us the charge of iron. The charge of iron (the transition metal) must be written as a roman numeral in the name.

Why do we bother putting roman numerals in the name when dealing with transition metals?

• They can form various ions, so it tells us the charge

• They will always form the same ion, but its helpful to include it

• They always form a +1 charge

Silver (Ag) always makes the ion...

• Ag+1

• Ag-1

• Ag2+

• It is a transition metal, trick question

Zinc (Zn) always forms an ion that is...

• Zn²⁺

• Zn^2-

• Zn^1-

• It's a transition metal. Trick Question!

When naming ionic compounds that contain Ag or Zn, you should use roman numerals.

• true

• false

Answer explanation

Both Ag and Zn form only one type of ion, no roman numerals allowed!