1 M³⁺ ion and 3 NO₃⁻ ions ( Where M³⁺ stands for the group 13 cation).
Explanation:
Group 13 elements are Boron , Aluminium, Galium, Indium and Thalium. When they form ionic compounds they can lose their three valence electrons to form a tripositive (+3) ion.Nitrate ion is a negative ion with a single negative(-1) charge. When these two form a compound 3 univalent negative nitrate ions must combine with one tripositive group 13 element to form a neutral compound. So the total no of ions is 4.
