Multiple choice

Which of the following is not the correct order in terms of increasing atomic radii?

  1. Li < Na < K

  2. Be < Mg < Ca

  3. He < Ne < Ar

  4. Al < Si < P
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

On moving from left to right in a period, atomic radius decreases due to increase in the effective nuclear charge. Therefore the correct order in terms of increasing atomic radii is: Al > Si > P.

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