Answer:
Roman numerals filling the name
Explanation:
The transition metal is elements that are located in groups 3- 12 of the periodic table. One of the traits that transition metal has is that they have two or more oxidation state
The example for this is aluminum, you might read that it's written as Aluminum(III) when the ion has +3 charge. While +3 is the most common oxidation state, aluminum can be at +2 state or +1 state.
