Question

Which ion has the largest radius?
A) O2-
B) S2-
C) Se2-
D) Te2-

Answer 1

The ion with the largest radius is S2-.

Step-by-step explanation:

The ion with the largest radius is S2-. In general, as we move across a period in the periodic table, the atomic radius decreases due to the increase in the number of protons and electrons in the nucleus. However, as we move down a group, the atomic radius increases due to the addition of new energy levels. Therefore, since S2- is further down the same group as O2-, S2- has a larger radius.