An atom of which of the following elements has the smallest atomic radius?. Sb B. I C. Te D. Rb E. Sn

Answer: Iodine

Explanation:

Atomic radius decreases across the period due to the increase in the size of the nuclear charge without a corresponding increase in the number of shells. The atoms become smaller from left to right across the period table. This is the reason why atomic radius decreases across the period.