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I have personally not seen an instance where the transition metal has a negative anion charge if the charge is designated by a parentheses. If I see a roman numeral, I assume it's "plus whatever that charge is" and it works for me.
Debora Fernandez Clemente_ 4H wrote:How do you calculate the oxidation number of the metal in a complex?
To calculate the oxidation number of the metal in a complex, you would use the equation:
(# metal atoms)(oxidation number of the metal)+(# each ligand)(charge of each ligand)= charge of ion
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