MDCAT Chemistry MCQ #1759

In the Lewis structure of the ammonium ion (NH4+), what is the calculated formal charge on the nitrogen atom based on its valence electrons?

MDCAT Chemistry MCQ #1759

  1. Question 1

    Q1. In the Lewis structure of the ammonium ion (NH4+), what is the calculated formal charge on the nitrogen atom based on its valence electrons?

    • A) -1
    • B) 0
    • C) +1
    • D) +5

    Answer: +1

    Explanation: Formal charge = Valence electrons - (Unshared + 0.5*Shared). 5 - (0 + 4) = +1. 0 would imply a neutral atom with five bonds.