Multiple Choice
Which of the following statements correctly describes the Lewis dot structure of ethanol (C2H5OH)?
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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 a neutral molecule of HF?
A
The hydrogen atom has one lone pair, and fluorine shares a single pair of electrons with hydrogen.
B
The hydrogen atom shares a single pair of electrons with fluorine, and fluorine has three lone pairs.
C
Both hydrogen and fluorine have no lone pairs, and they share a single pair of electrons.
D
The hydrogen atom shares two pairs of electrons with fluorine, and fluorine has two lone pairs.
Verified step by step guidance1
Recall that a Lewis dot structure represents the valence electrons of atoms in a molecule, showing bonding pairs (shared electrons) and lone pairs (non-bonding electrons).
Identify the valence electrons for each atom: hydrogen has 1 valence electron, and fluorine has 7 valence electrons.
Determine how these electrons are shared or remain as lone pairs: hydrogen needs 1 more electron to complete its duet, and fluorine needs 1 more electron to complete its octet.
Form a single covalent bond by sharing one pair of electrons between hydrogen and fluorine, satisfying hydrogen's duet and contributing to fluorine's octet.
Assign the remaining 6 valence electrons on fluorine as three lone pairs, since fluorine originally has 7 valence electrons and shares 1 with hydrogen.
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