Multiple Choice
Which of the following statements correctly describes the Lewis dot structure of neutral SeF2O?
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11. Bonding & Molecular Structure
Lewis Dot Structures: Neutral Compounds
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Which of the following best describes the Lewis dot structure of the neutral compound SiH_4?
A
Silicon atom in the center with four single bonds to four hydrogen atoms, and two lone pairs on silicon.
B
Silicon atom in the center with four single bonds to four hydrogen atoms, and no lone pairs on silicon.
C
Silicon atom in the center with two double bonds to two hydrogen atoms, and two lone pairs on silicon.
D
Silicon atom in the center with four single bonds to four hydrogen atoms, and one lone pair on each hydrogen.
Verified step by step guidance1
Recall that a Lewis dot structure represents the valence electrons of atoms in a molecule, showing bonds as shared electron pairs and lone pairs as non-bonding electrons.
Determine the total number of valence electrons in SiH_4: Silicon (Si) has 4 valence electrons, and each Hydrogen (H) has 1 valence electron, so total electrons = 4 + (4 × 1) = 8 electrons.
Place the silicon atom in the center because it is less electronegative and can form multiple bonds, then arrange the four hydrogen atoms around it.
Form single bonds between the silicon atom and each hydrogen atom, using 2 electrons per bond, which accounts for all 8 valence electrons (4 bonds × 2 electrons each = 8 electrons).
Check for lone pairs: since all valence electrons are used in bonding, there are no lone pairs on silicon or hydrogen atoms in SiH_4.
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