Answer : The chemical name of the compound [tex]Ni_2O_3[/tex] is, nickel(III)oxide.
Explanation :
The rules for naming the chemical name of the compound :
In the given compound, the nickel is the cation and first element in the formula and the oxidation state of nickel is, (+3). The second element is oxygen which is named as oxide.
Thus, the chemical name of the compound [tex]Ni_2O_3[/tex] is, nickel(III)oxide.