Multiple Choice
For the neutral molecule NH3, how many lone pairs of electrons should be added to complete its Lewis dot structure?
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11. Bonding & Molecular Structure
Lewis Dot Structures: Neutral Compounds
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In the Lewis dot structure of a neutral O_2 molecule, how many electrons are involved in bonding between the two oxygen atoms?
A
4
B
2
C
8
D
6
Verified step by step guidance1
Recall that the Lewis dot structure represents valence electrons around atoms, showing bonding and lone pairs.
Determine the total number of valence electrons for the O_2 molecule: each oxygen atom has 6 valence electrons, so total electrons = 6 \times 2 = 12.
Arrange the two oxygen atoms with a bond between them and distribute the electrons to satisfy the octet rule for each atom.
Count the number of bonding electrons (shared between the two atoms) in the Lewis structure. Each bond consists of 2 electrons.
Identify the bond order in O_2, which is a double bond, meaning there are 2 bonds or 4 bonding electrons shared between the oxygen atoms.
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