We know that Copper ll 's symbol is [tex] Cu^{+2} [/tex] and Nitride's is [tex] N^{-2} [/tex]
Because both have opposite charges of +2 and -2, they both cancel out when written. When writing a chemical formula, the cation (positive ion/element) is written before the anion (negative ion). The formula name already had the correct order. Therefore, your chemical formula is just CuN
Hope this helps!
