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NEET2003ChemistryStructure of AtomActual

The ions O ²⁻, F ⁻, Na ⁺, Mg ²⁺ and Al ³⁺ are isoelectronic. Their ionic radii show:

Options

  1. Aa significant increase from O ²⁻ to Al ³⁺
  2. Ba significant decrease from O ²⁻ to Al ³⁺
  3. Can increase from O ²⁻ to F ⁻ and then decrease from Na ⁺ to Al ³⁺
  4. Da decrease from O ²⁻ to F ⁻ and then increase from Na ⁺ to Al ³⁺

Correct answer

B. a significant decrease from O ²⁻ to Al ³⁺

Step-by-step solution

Ionic radii decrease with the increase in charge on species.

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