The crystals of _ are ionic solids
Correct answer: D. Na
- A. Sugar
- B. Iron
- C. Diamond
- D. Na
Explanation
Ions bound together by electrostatic attraction form ionic crystals. Their arrangement varies depending on the ions' sizes or the radius ratio
This question appeared on the UHS MDCAT 2008 paper, which you can sit online with every answer explained.
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About Ionic and Molecular Crystals
Ionic crystals contain oppositely charged ions held by electrostatic forces, whereas molecular crystals contain discrete molecules joined by weaker intermolecular forces. Their structures explain differences in melting point, hardness, volatility, solubility and electrical conductivity, especially between solid and molten states.
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