Question

storyline 1 exam
which of the following lewis structures correctly represent cacl₂?
○ :cl: ca²⁺ :cl:
○ :cl⁻: ca²⁺ :cl⁻
○ :cl⁻: ca²⁺ :cl:
○ :cl⁻: ca :cl⁻:

Explanation:

Calcium chloride (\(CaCl_2\)) is an ionic compound. In ionic compounds, the metal (Ca) loses electrons to form a cation (\(Ca^{2+}\)) and the non - metal (Cl) gains electrons to form an anion (\(Cl^-\)). The Lewis structure of an ionic compound shows the cation and the anions with their charge and electron - dot representation. The chloride ions (\(Cl^-\)) should have a negative charge (indicated by the superscript \(-\)) and the calcium ion should be \(Ca^{2+}\).

Answer:

\(\ce{:Cl^{-}: Ca^{2+} :Cl^{-}:}\) (the second option)