Which of these atoms has the smallest radius?
A) Al
B) P
C) As
D) Te
E) Na

Question

Quizplus · Accepted Answer

Phosphorus (P) has the smallest atomic radius among the options given. Atomic radius generally decreases across a period from left to right due to the increase in nuclear charge, which pulls the electrons closer to the nucleus. Phosphorus is to the right of Aluminum and Sodium in the same period, indicating a smaller atomic radius. Additionally, as you move down a group, atomic radius increases due to the addition of electron shells, making Phosphorus smaller than Arsenic and Tellurium, which are below it in the same group.

Which of These Atoms Has the Smallest Radius