Respuesta :

missyvee
breaking up the compound into simply Ni and SO4 helps with naming. 

ni = nickel
SO4 = sulfate

with transition metals, you must include the change in the name after the element which in this case is 3. 

Ni2(SO4)3 
Nickel (II) Sulfate

Hagrid
The correct answer for this question is Nickel (III) SUlfate

We need to know what composed the compound.
We have Ni and SO4.

ni = nickel
SO4 = sulfate

Ionic compounds don't get prefixes like di-, tri-, or any of those.


Take note of the 2 and 3