Question

question 1 of 10
how are oxidation states of transition metals indicated in the names of metal compounds?
a. group numbers are used to indicate oxidation states.
b. prefixes are used to indicate oxidation states.
c. subscripts are used to indicate oxidation states.
d. roman numerals are used to indicate oxidation states.

Explanation:

In naming metal compounds with transition metals, Roman numerals in parentheses are used to indicate the oxidation state of the transition - metal ion. This is because transition metals can have multiple oxidation states. For example, iron(II) chloride has iron in the + 2 oxidation state and iron(III) chloride has iron in the + 3 oxidation state.

Answer:

D. Roman numerals are used to indicate oxidation states.