Answer: The cation is small and highly charged, and the anion is large and highly charged.
- A The cation is small and highly charged, and the anion is large and highly charged
- B Both the cation and the anion happen to be of nearly identical ionic radius
- C The compound has already been independently classified as purely ionic
- D The surrounding reaction temperature is kept unusually high throughout
Correct answer: A. The cation is small and highly charged, and the anion is large and highly charged
Explanation: Fajan's rules: high charge density of the cation polarises the large anion, increasing covalent character.
VSEPR theory predicts molecular shape from the number of bonding and lone electron pairs around the central atom.
Concept context
Understand how atoms join to form molecules. Covers ionic and covalent bonding, VSEPR theory, hybridization (sp, sp², sp³), molecular orbital theory, bond polarity, and intermolecular forces like hydrogen bonding.
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