MDCAT Chemistry MCQ #852

How does the effective nuclear charge differ between aluminum (Al) and chlorine (Cl) in the same period?

MDCAT Chemistry MCQ #852

  1. Question 1

    Q1. How does the effective nuclear charge differ between aluminum (Al) and chlorine (Cl) in the same period?

    • A) Cl has higher ENC due to more protons
    • B) Al has higher ENC due to fewer electrons
    • C) Both have equal ENC
    • D) ENC depends on core electrons only

    Answer: Cl has higher ENC due to more protons

    Explanation: Chlorine's greater proton count increases effective nuclear charge despite same shielding as aluminum.