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  • Periodic Table Trends and Structure
  • Which element has the LOWEST atomic radius?
Multiple choice

Which element has the LOWEST atomic radius?

  1. Rb

  2. K

  3. Na

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

Atomic radius increases as you move down a group. Sodium (Na) is in the third period, while Potassium (K) and Rubidium (Rb) are in the fourth and fifth periods respectively, making Na the smallest of the three.

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