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AP Chemistry
2.6 Resonance and Formal Charge
2.5 Lewis Diagrams
IntermediateMCQConceptual22.1k
Three distinct Lewis electron-dot diagrams labeled Structure 1, Structure 2, and Structure 3 are arranged horizontally in a single row from left to right. Structure 1 on the left shows three linear atoms: a left terminal N, a central N, and a right terminal O. The left N is connected to the central N by a triple bond (three parallel horizontal lines) and has exactly one lone pair (two dots to its left). The central N has zero lone pairs. The central N is connected to the right O by a single bond (one horizontal line). The right O has exactly three lone pairs: two dots above, two dots below, and two dots to its right. Structure 2 in the center shows three linear atoms: a left terminal N, a central N, and a right terminal O. The left N is connected to the central N by a double bond (two parallel horizontal lines) and has exactly two lone pairs (two dots above, two dots to the left; no dots below). The central N has zero lone pairs. The central N is connected to the right O by a double bond (two parallel horizontal lines). The right O has exactly two lone pairs (two dots above, two dots to the right; no dots below). Structure 3 on the right shows three linear atoms: a left terminal N, a central N, and a right terminal O. The left N is connected to the central N by a single bond (one horizontal line) and has exactly three lone pairs: two dots above, two dots below, and two dots to its left. The central N has zero lone pairs. The central N is connected to the right O by a triple bond (three parallel horizontal lines). The right O has exactly one lone pair (two dots to its right). All text and symbols are black on a white background. No other particles, labels, text, or annotations appear.
Three proposed Lewis electron-dot structures for \(\text{N}_2\text{O}\).
Three candidate Lewis electron-dot structures for the dinitrogen monoxide molecule, \(\text{N}_2\text{O}\), are shown below.

Which of the following identifies the structure that contributes most to the actual electron distribution in \(\text{N}_2\text{O}\) and provides the correct justification?

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