Which of the following elements has the smallest atomic radius among Li, Be and B?

Options

  • A. Lithium
  • B. Beryllium
  • C. Boron
  • D. More than one of the above
  • E. None of the above

Correct Answer (Detailed Explanation is Below)

C. Boron

Detailed Explanation

Li, Be and B occur from left to right in the same period, and atomic radius decreases across the period. Therefore boron has the smallest radius.