Answer
1) Na, Na+
2) S, S-2
3) I, I-
4) Al, Al+3
Work Step by Step
1) Na has the larger radius because cations are usually smaller than the neutral atom they originated from.
2) Al has the larger radius because cations are usually smaller than the neutral atom they originated from.
3) Na has the larger radius because cations are usually smaller than the neutral atom they originated from.
4) Al has the larger radius because cations are usually smaller than the neutral atom they originated from.
