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  • Periodic Classification - 2 (Class X)
  • Which of the following has the highest number of shells i...
Multiple choice

Which of the following has the highest number of shells in its atom?

  1. Na

  2. Al

  3. Ca

  4. Ar

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

Calcium belongs to the fourth period and has 4 shells. All others belong to the third period and have 3 shells.

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