Determining Roman Numerals and Practice w Polyatomic Ions

What do Roman Numerals represent in the name of a transition metal compound?

• how many atoms of the metal there are
• the oxidation number of the nonmetal
• the oxidation number of the metal
• the mass number

Where are the Roman Numerals located in a transition metal compound?

• after the anion
• before the cation
• between the cation and anion
• they are not used for transition metals

The name for Cr₂S:

• Chromium (I) sulfide
• Chromium sulfide (I)
• Chromium (II) sulfide
• Chromium  sulfide (II)

The name for CrS

• Chromium (I) sulfide
• Chromium (II) sulfide
• Chromium  sulfide
• Chromium  sulfide (II)

The name for CrN:

• Chromium nitride
• Chromium (I) nitride
• Chromium (III) nitride
• Chromium nitride (III)

The name for Cr₃N:

• Chromium nitride (III)
• Chromium nitride
• Chromium (III) nitride
• Chromium (I) nitride

The name for MoP:

• Molybdenum (III) Phosphate
• Molybdenum (I) Phosphide
• Molybdenum (I) Phosphate
• Molybdenum (III) Phosphide

The oxidation number for Fe in Fe₂O₃:

• +2
• +3
• +1
• -2

The oxidation number for copper in Cu₂S:

• +1
• +2
• -1
• -2

The formula for Mercury (II) chloride is:

• HgCl
• MgCl₂
• HgCl₂
• McCl₂