MDCAT Chemistry MCQ #748

The element with the electron configuration 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ is

MDCAT Chemistry MCQ #748

  1. Question 1

    Q1. The element with the electron configuration 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ is

    • A) Potassium
    • B) Calcium
    • C) Scandium
    • D) Argon

    Answer: Potassium

    Explanation: The given configuration corresponds to potassium (Z=19); calcium has an additional electron in 4s.