Naming Ionic Compounds with Transition Metals

What is the purpose of using Roman numerals in the names of compounds containing transition metals?

• To indicate the number of atoms

• To show the charge of the transition metal

• To denote the number of bonds

• To represent the atomic mass

In the compound CrBr2, what is the charge on the chromium ion?

• 6+

• 1+

• 3+

• 2+

What is the name of the compound CrBr2?

• Chromium bromide

• Chromium(II) bromide

• Chromium(III) bromide

• Chromium(IV) bromide

In the compound Au2S, what is the charge on each gold ion?

• 3+

• 4+

• 2+

• 1+

What is the name of the compound Au2S?

• Gold(II) sulfide

• Gold(III) sulfide

• Gold(I) sulfide

• Gold(IV) sulfide

In the compound Co3N2, what is the charge on each cobalt ion?

• 1+

• 2+

• 3+

• 4+

What is the name of the compound Co3N2?

• Cobalt(V) nitride

• Cobalt(II) nitride

• Cobalt(III) nitride

• Cobalt(IV) nitride

Why don't we use Roman numerals for naming ZnO?

• Zinc is not a transition metal

• Zinc is a non-metal

• Zinc forms multiple ions

• Zinc can only form one type of ion

What is the name of the compound ZnO?

• Zinc(II) oxide

• Zinc(III) oxide

• Zinc oxide

• Zinc(IV) oxide

In the compound V(CO3)2, what is the charge on the vanadium ion?

• 2+

• 4+

• 5+

• 3+