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What do the Roman numerals in a cation's name indicate?
how many valence electrons in the atom
the cation's ability to become an anion
the positive charge on the cation
how many compounds the cation can form

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The Roman numerals in a cation's name indicate: THE POSITIVE CHARGE ON THE CATION

Cations are metallic atoms that loosely hold it electrons, making it easy to lose electrons.

The Roman numerals in a cation's name not only indicates the charge on the cation but it makes it easier to distinguish cations that share the same metal name. 

Answer: Option (c) is the correct answer.

Explanation:

When an element gain electrons then it acquires a negative charge. For example, [tex]Cl + 1e^{-} \rightarrow Cl^{-}[/tex]

Whereas when an element loses electrons then it acquires a positive charge.

For example, [tex]Fe \rightarrow Fe^{2+} + 2e^{-1}[/tex]

The atom [tex]Fe^{2+}[/tex] can also be written using roman numerals as Fe(II).

Therefore, we can conclude that roman numerals in a cation's name indicate the positive charge on the cation.

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