Multiple Choice
Which of the following statements correctly describes the Lewis dot structure of neutral N2H4 (hydrazine)?
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11. Bonding & Molecular Structure
Lewis Dot Structures: Neutral Compounds
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Which of the following statements correctly describes the Lewis dot structure of the neutral compound BCl_3?
A
Boron is surrounded by three double bonds to chlorine atoms.
B
Boron is surrounded by two single bonds and one double bond to chlorine atoms.
C
Boron is surrounded by three single bonds to chlorine atoms and has one lone pair.
D
Boron is surrounded by three single bonds to chlorine atoms and has no lone pairs.
Verified step by step guidance1
Recall that the Lewis dot structure represents valence electrons as dots and bonds as lines between atoms, showing how atoms share electrons to achieve stable electron configurations.
Identify the valence electrons for each atom: Boron (B) has 3 valence electrons, and each Chlorine (Cl) has 7 valence electrons.
Determine the total number of valence electrons in BCl_3 by adding Boron's 3 electrons and three Chlorines' 7 electrons each, for a total of 3 + (3 × 7) = 24 valence electrons.
Arrange Boron as the central atom and connect it to each Chlorine atom with single bonds, using 2 electrons per bond, which accounts for 6 electrons total.
Distribute the remaining electrons to complete the octets of the Chlorine atoms (each needs 8 electrons total), and check Boron's electrons; Boron typically forms three single bonds and does not have a full octet or lone pairs in BCl_3.
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