11.
Which of the following ions are unlikely to be found in a chemical compound: Cs^+; In^4+;Te^3-;P^3-?
a. Cs^+
b. In^4+
c. Te^3-
d. P^3-
e.In^4+ and Te^3-
f.In^4+ and P^3-
The answer is e. but can someone explain how to find this answer, and in general, how to approach this problem.
Thank you