the correct formula for the ionic compound containing Tl^3+ and Te^2- ions would be:

a. TlTe
b. Tl3Te2
c. Tl2Te3
d. Tl2Te

I would go with C.

To determine the correct formula of an ionic compound, we need to balance the charges of the ions involved. In this case, we have a Tl^3+ ion (with a +3 charge) and a Te^2- ion (with a -2 charge).

The positive and negative charges must balance out in ionic compounds. This means that we need three Te^2- ions to balance with one Tl^3+ ion.

Based on this, the correct formula for the ionic compound containing Tl^3+ and Te^2- ions would be Tl2Te3.

Therefore, the correct answer is (c) Tl2Te3.

To determine the correct formula for the ionic compound containing Tl^3+ and Te^2- ions, we need to balance the charges. Since Tl^3+ has a charge of 3+ and Te^2- has a charge of 2-, we need two Tl^3+ ions to balance the charge of three Te^2- ions.

Therefore, the correct formula would be:

c. Tl2Te3