We’re being asked to draw a Lewis structure for NH4+.
Since hydrogen cannot be a central atom, N is the central atoms.
Group Valence Electrons
N 5A 1 × 5 e– = 5 e–
H 1A 4 × 1 e– = 4 e–
From +1 charge: – 1 e–
Total: 8 valence e–
H → 1 bond only
Draw the Lewis structure for ammonium, NH4+.
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