Multiple Choice
Which of the following correctly represents the Lewis dot structure for the beryllium ion, Be^{2+}?
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11. Bonding & Molecular Structure
Lewis Dot Structures: Ions
Multiple Choice
Which of the following correctly describes the Lewis dot structure for the copper(II) chloride ion, CuCl2?
A
Cu^{2+} is surrounded by two Cl^{-} ions, each with three lone pairs, and no lone pairs on Cu^{2+}.
B
Cu^{2+} shares a double bond with each Cl atom, and each Cl has two lone pairs.
C
Cu^{2+} forms a linear structure with Cl_{2}^{2-}, and each Cl atom has one lone pair.
D
Cu^{2+} is surrounded by two Cl atoms, each with four lone pairs, and Cu^{2+} has two lone pairs.
Verified step by step guidance1
Identify the species involved: CuCl2 consists of a copper ion with a +2 charge (Cu^{2+}) and two chloride ions (Cl^{-}).
Recall that chloride ions (Cl^{-}) typically have a full octet with three lone pairs of electrons around each chlorine atom.
Consider the electron configuration of Cu^{2+}: as a metal cation, it usually does not have lone pairs in its valence shell when bonded in ionic compounds.
Understand that Cu^{2+} and Cl^{-} ions interact primarily through ionic bonds rather than covalent bonds with shared electron pairs, so no double bonds are expected.
Conclude that the Lewis structure should show Cu^{2+} surrounded by two Cl^{-} ions, each Cl having three lone pairs, and no lone pairs on Cu^{2+}.
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