Multiple Choice
Determine the Lewis Dot Structure for the following compound: SOCl2
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4. Molecular Compounds
Lewis Dot Structures: Exceptions (Simplified)
Multiple Choice
Metalloids can sometimes adopt the bonding preferences of similar nonmetals. Based on your knowledge of expanded octets, draw the Lewis Dot Structure for the following ion, SiF62–.
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Verified step by step guidance1
Identify the central atom in the ion, which is silicon (Si). Silicon is a metalloid and can have an expanded octet.
Determine the total number of valence electrons available. Silicon has 4 valence electrons, and each fluorine (F) atom has 7 valence electrons. Since there are 6 fluorine atoms, this contributes 42 electrons. Additionally, the 2- charge adds 2 more electrons, totaling 48 valence electrons.
Place the silicon atom in the center and arrange the six fluorine atoms around it. Each fluorine atom will form a single bond with silicon, using 2 electrons per bond, which accounts for 12 electrons (6 bonds x 2 electrons).
Distribute the remaining electrons to satisfy the octet rule for each fluorine atom. Each fluorine atom needs 8 electrons to complete its octet, including the electrons in the bond with silicon. Therefore, each fluorine will have 6 non-bonding electrons (3 lone pairs).
Ensure the silicon atom has an expanded octet, which is possible for elements in the third period and beyond. Silicon will have 12 electrons around it, accommodating the 6 bonds with fluorine.
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