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BITSAT2024ChemistryClassification of Elements and Periodicity in PropertiesActual

The ionic radii in (Ã…) of N ³⁻, O ²⁻ and F ⁻ are respectively.

Options

  1. A1.71, 1.40 and 1.36
  2. B1.71, 1.36 and 1.40
  3. C1.36,1.40 and 1.71
  4. D1.36,1.71 and 1.40

Correct answer

A. 1.71, 1.40 and 1.36

Step-by-step solution

N ³⁻, O ²⁻ and F ⁻ are isoelectronics ( 10 electrons) species. Their ionic radii will decrease with increase in magnitude of the nuclear charge from N ( Z =7) to O (Z=8) and F(Z=9) . i.e. array ccc N ³⁻ & O ²⁻ & F ⁻ 1.71 Ã… & 1.40 Ã… & 1.36 Ã… array Hence, option (1) is correct.

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