AP Chemistrymediummcq1 pt
Calculate the formal charge on nitrogen in NH₄⁺ (four N–H bonds, no lone pairs).
A.+1
B.0
C.−1
D.+2
Explanation
Core Concept
Formal charge = valence (5) − lone electrons (0) − ½ bonding electrons (½ × 8 = 4) = +1. The sum of formal charges must equal the ion's charge, which checks out.
Correct Answer
A+1
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