Multiple choice

Which of the following has the least number of shells?

  1. Na

  2. K

  3. Li

  4. All of them have equal no. of shells.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Li occurs at the top of the alkali metals group. Number of shells increases down a group. So, Li is smallest with least no. of shells, with Na and K following the order.

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