MDCAT Chemistry MCQ #806

Which of the following shows an unexpected increase in atomic radius despite moving left across a period?

MDCAT Chemistry MCQ #806

  1. Question 1

    Q1. Which of the following shows an unexpected increase in atomic radius despite moving left across a period?

    • A) Lead to Tin
    • B) Germanium to Silicon
    • C) Sulfur to Phosphorus
    • D) Chlorine to Argon

    Answer: Chlorine to Argon

    Explanation: Argon's noble gas radius is larger than Cl's due to electron-electron repulsion. Option C follows regular trends.