Question

If a metallic element can form multiple cations, what is the preferred way to name the element?

A.

Write the symbol of the element with the oxidation number superscripted to the right of the symbol.

B.

Write the symbol of the element with the oxidation number subscripted to the right of the symbol.

C.

Write the element name with a Roman numeral in parentheses to indicate the charge.

D.

Write the element symbol with a Roman numeral in parentheses to indicate the charge.

Answer 1

To name, the element, it's C, the Stock nomenclature system lets us do iron (III) for Fe3+ etc.

Answer 2

first, isnt C and D the same, is there a typo? second, (III) means oxidation state, not charge

Answer 3

No options (c) & (d) arenot the same ,

the option D should be correct .

u may take example & see THAT IRON exists as \(Fe^{+2}\) & \(Fe^{+3}\) ions.
these two ions are respectively represented as Fe(II) & Fe(III).

Answer 4

@caozeyuan Oxidation state and charge are the same thing when it's a cation, we just don't usually talk about charge when we're talking about elements in compounds and ions because an ion already has a charge and a compound has no charge.