Multiple choice

Which is the smallest atom among the following atoms : Na, Al, Cl, S

  1. Na

  2. Al

  3. Cl

  4. S

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Along a period, from left to right the atomic radius goes on decreasing. All the atoms mentioned belong to the 3rd period. Hencechlorine, the element on the extreme right of the period is the smallest atom