Question

Write the correct name for the following two compounds. Use lower case. If roman numerals are needed, use a space after the parentheses, but there should not be a space before the parentheses. Example: manganese(II) oxide (not manganese (II) oxide). Li3N CuO

Answer 1

The correct name for Li3N is lithium nitride and for CuO it is copper(II) oxide, signifying that the copper ion has a +2 charge.

Step-by-step explanation:

When naming ionic compounds, the cations with variable charge should include the charge in Roman numerals immediately following the name of the element. These Roman numerals are enclosed in parentheses. Therefore, the correct name for Li3N would be lithium nitride, as lithium only has one possible charge (+1), so we do not need to indicate its charge. For CuO, since copper can have more than one possible charge, it is necessary to specify the charge in the name. Copper in CuO has a charge of +2, so the correct chemical name is copper(II) oxide.