write the formulas of the complex ion formed between

Question

a) the ligand, Cl-, and the platinum(II) ion with a coordination number of four.

b) the ligand, NH3, and the nickel(II( ion with a coordination number of six.

c)the ligand, ethylenediamine, and the chromium (III) ion with a coordination of number six.

d) the ligand, dihydrogen ethylenediaminetetraacetate, abbreviated H2Y^2- and the zinc(II) ion with a coordination number of four.