Which of the elements listed below has the greatest atomic radius
A) B
B) Al
C) S
D) P
E) Si

Question

Quizplus · Accepted Answer

Aluminum (Al) has the greatest 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 electrons closer to the nucleus. It increases down a group as additional electron shells are added. Since Aluminum is below Boron in the same group, it has a larger atomic radius than Boron, Silicon, Phosphorus, and Sulfur.

Which of the Elements Listed Below Has the Greatest Atomic