Which of the following metals would not use a Roman numeral as part of its name in a compound?

Question

Quizplus · Accepted Answer

Calcium (Ca) is a Group 2 element, meaning it always has a charge of +2 in compounds, so a Roman numeral is not necessary to indicate its charge. Chromium (Cr), Manganese (Mn), and Cobalt (Co) are all transition metals, which can have variable charges and therefore require a Roman numeral in their compound names to indicate their specific charge.

Which of the Following Metals Would Not Use a Roman