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CuSO4    = Copper(II) sulphate

Iron(II) oxide  =  FeO

You need to remember the name of ions first from the common list available in many books.First the name of positively charged ion (cation) is written with its charge in roman followed by name of the anion. Remember that valencies are cross multiplied while writing formulae.

For example CuSO4 Copper(II) sulphate

Iron(II) oxide FeO

CuSo4 copper sulphate

Iron(2) oxide.  Ferrous sulphate

This is a YouTube video I produced and it may help you in this regard:

https://www.youtube.com/edit?o=U&video_id=QqT2uZZL8RY


Do you need some help with this jarnol13?

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