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Which of the following statements correctly describes the Lewis dot structure of the SF_3^- ion?
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11. Bonding & Molecular Structure
Lewis Dot Structures: Neutral Compounds
Scelta multipla
Which of the following best represents the Lewis dot structure of methane (CH_4)?
A
A central carbon atom with one triple bond to a hydrogen atom and three single bonds to three hydrogen atoms.
B
A central carbon atom with four single bonds to four hydrogen atoms, and no lone pairs on carbon.
C
A central carbon atom with four lone pairs and no bonds to hydrogen atoms.
D
A central carbon atom with two double bonds to two hydrogen atoms, and two lone pairs on carbon.
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Recall that the Lewis dot structure represents the valence electrons of atoms and how they are shared or paired in bonds.
Determine the number of valence electrons for each atom: Carbon has 4 valence electrons, and each Hydrogen has 1 valence electron.
Since methane (CH_4) has one carbon and four hydrogens, the total valence electrons to be represented are 4 (from C) + 4 × 1 (from H) = 8 electrons.
Carbon typically forms four single covalent bonds to complete its octet, and hydrogen forms one single bond to complete its duet.
Therefore, the correct Lewis structure shows a central carbon atom with four single bonds to four hydrogen atoms, with no lone pairs on carbon.
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