Multiple Choice
What is the approximate bond angle around the central carbon atom in the Lewis structure of the neutral compound CHCl3 (chloroform)?
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11. Bonding & Molecular Structure
Lewis Dot Structures: Neutral Compounds
Multiple Choice
Which of the following best describes the Lewis dot structure of a neutral H2S molecule?
A
Sulfur atom in the center with two double bonds to hydrogen atoms and no lone pairs on sulfur.
B
Sulfur atom in the center with two single bonds to hydrogen atoms and no lone pairs on sulfur.
C
Sulfur atom in the center with two single bonds to hydrogen atoms and two lone pairs on sulfur.
D
Sulfur atom in the center with one single bond and one double bond to hydrogen atoms and one lone pair on sulfur.
Verified step by step guidance1
Step 1: Identify the total number of valence electrons in the H2S molecule. Hydrogen has 1 valence electron each, and sulfur has 6 valence electrons, so total valence electrons = 2 × 1 + 6 = 8 electrons.
Step 2: Determine the central atom, which is sulfur because it is less electronegative than hydrogen and can form more bonds.
Step 3: Draw single bonds between the sulfur atom and each hydrogen atom. Each single bond represents 2 electrons, so 2 bonds use 4 electrons.
Step 4: Distribute the remaining valence electrons as lone pairs on the sulfur atom. Since 4 electrons are used in bonds, 4 electrons remain, which form two lone pairs on sulfur.
Step 5: Confirm that each hydrogen has a full valence shell (2 electrons) and sulfur has an octet (8 electrons total: 4 from bonds and 4 from lone pairs), ensuring the Lewis structure is complete and neutral.
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