Roman numerals

[Emily Vainberg 1D]

If a problem says: Indium(III) sulfide
Does the (III) just give the charge for Indium or is it telling us how many atoms of Indium there will be?

I'm assuming charge since the formula is Ir2S3.

[sarahforman_Dis2I]

If a problem says: Indium(III) sulfide
Does the (III) just give the charge for Indium or is it telling us how many atoms of Indium there will be?

I'm assuming charge since the formula is Ir2S3.

It is telling you the charge of In. Since In is a metal, it forms a cation. The roman numerals are just telling you the charge of the cation.

[205150314]

Yes, the roman numerals represent the charge for the transition metals