Multiple Choice
Which of the following best represents the Lewis dot structure for the ions in potassium sulfide (K2S)?
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11. Bonding & Molecular Structure
Lewis Dot Structures: Ions
Multiple Choice
Which of the following Lewis dot diagrams correctly represents the ionic compound KCl?
A
[K]^+ [Cl]^− with Cl surrounded by 8 dots
B
K with 1 dot Cl with 7 dots
C
K with no dots Cl with no dots
D
[K]^+ [Cl]^− with Cl surrounded by 7 dots
Verified step by step guidance1
Step 1: Understand that KCl is an ionic compound formed between potassium (K) and chlorine (Cl). Potassium tends to lose one electron to become K⁺, and chlorine tends to gain one electron to become Cl⁻.
Step 2: Recognize that in the Lewis dot diagram for ionic compounds, the metal (K) is represented as a cation with no dots because it has lost its valence electron, and the nonmetal (Cl) is represented as an anion with a full octet (8 dots) around it, indicating it has gained an electron.
Step 3: Write the Lewis dot structure for K as [K]^+ with no dots, showing it has lost its one valence electron.
Step 4: Write the Lewis dot structure for Cl as [Cl]^− with 8 dots around it, representing the full octet after gaining one electron from K.
Step 5: Confirm that the correct Lewis dot diagram for KCl is [K]^+ [Cl]^− with Cl surrounded by 8 dots, indicating the ionic bond formed by electron transfer.
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