Hey there! Nomenclature is a bit hard to get going at first, but once you get the hang of it it's a lot more straightforward!
The first thing to do is to identify whether a compound is ionic or molecular- ionic compounds will have a metal element in them, while molecular compounds will have non-metals.
The second element in every compound will usually have a -ide suffix (Oxide, Fluoride, Sulfide, etc.)
In an ionic compound, if the metal element is a transition metal, then you will need to add in a Roman Numeral indicating its charge. For example, Cu(II)O is Copper(II) Oxide, with the Copper atom having a charge of +2 to balance Oxygen's -2.
If the compound is molecular, then the elements will usually have a suffix in front of it that corresponds to its quantity within the compound. For example, S2Cl2 is Disulfur Dichloride. If the first element has only one atom, then there's no need to put any suffix (e.g. SO2: Sulfur Dioxide).
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