Ionic Class Formula Video

What does the Roman numeral in the name of an ionic compound containing a transition metal represent?

• The number of atoms of the transition metal in the formula.

• The atomic number of the transition metal.

• The charge of the transition metal ion.

• The group number of the transition metal on the periodic table.

When writing the formula for Chromium (II) Iodide, what common misconception should be avoided regarding the Roman numeral (II)?

• That it indicates the number of chromium atoms in the formula.

• That it indicates the number of iodide ions.

• That it indicates the total negative charge of the compound.

• That it indicates the atomic mass of chromium.

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What is the correct chemical formula for Manganese (III) Oxide?

• MnO

• Mn2O3

• Mn3O2

• MnO3

What is the correct chemical formula for Lead (IV) Nitrate?

• PbNO3

• Pb(NO3)2

• Pb(NO3)4

• Pb4NO3