Which of the following Period 3 atoms has the smallest radius?
A) Ar
B) Al
C) S
D) Na

Name: Which of the following Period 3 atoms has the smallest radius? A) Ar B) Al C) S D) Na
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Question

Quizplus · Accepted Answer

Ar (Argon) has the smallest atomic radius among the given options because it is the furthest to the right on the Periodic Table within the same period (Period 3). As you move from left to right across a period, the atomic radius decreases due to the increase in nuclear charge which pulls the electrons closer to the nucleus.

Which of the Following Period 3 Atoms Has the Smallest