Multiple Choice
Which of the following correctly represents the Lewis dot structure for a neutral molecule of ammonia (NH_3)?
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11. Bonding & Molecular Structure
Lewis Dot Structures: Neutral Compounds
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Which electron-dot (Lewis) structure correctly represents the neutral compound H_2?
A
H : H
B
H . . H
C
H - H
D
H H
Verified step by step guidance1
Understand that the Lewis structure represents the valence electrons of atoms and how they are shared or paired in a molecule.
Recognize that hydrogen (H) has 1 valence electron and needs 1 more electron to complete its duet (2 electrons total) for stability.
Since H₂ is a diatomic molecule with two hydrogen atoms, each hydrogen shares its single electron with the other, forming a single covalent bond.
Represent this single covalent bond as a pair of shared electrons between the two H atoms, which can be shown as a single line (H - H) or as a pair of dots between them (H : H).
Note that the other options either show incorrect electron arrangements (like lone pairs on hydrogen, which is not typical) or no bonding at all, so the correct Lewis structure for H₂ is the one showing a single bond between the two hydrogen atoms.
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