Question

Which of the following is not an ionic compound?

• A. \(Na_2O\)
• B. \(MgCl_2\)
• C. \(BeCl_2\)
• D. \(NaCl\)

Answer 1

The Correct Option is C

To solve the problem, we need to identify which among the given compounds is not an ionic compound.

1. Understanding Ionic Compounds:
Ionic compounds are formed by the transfer of electrons from a metal to a non-metal, resulting in the formation of positive and negative ions that are held together by strong electrostatic forces.

2. Analyze the Given Compounds:
- \( \text{Na}_2\text{O} \): Formed by sodium (metal) and oxygen (non-metal) → Ionic
- \( \text{MgCl}_2 \): Formed by magnesium (metal) and chlorine (non-metal) → Ionic
- \( \text{NaCl} \): Formed by sodium (metal) and chlorine (non-metal) → Ionic
- \( \text{BeCl}_2 \): Although it appears ionic, beryllium has a small size and high charge density, and forms covalent bonds with chlorine due to polarization.

3. Key Concept:
Beryllium chloride (\( \text{BeCl}_2 \)) is predominantly covalent due to the polarizing power of the Be²⁺ ion, which distorts the electron cloud of Cl⁻.

Final Answer:
The compound that is not an ionic compound is BeCl₂.