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JEE Main20205 Sep 2020Evening ShiftChemistryClassification of Elements and Periodicity in PropertiesActual

The correct order of the ionic radii of O 2 - , N 3 - , F - , Mg 2 + , Na + and Al 3 + is :

Options

  1. AN 3 - < O 2 - < F - < Na + < Mg 2 * < AI 3 +
  2. BAI 3 + < Na + < Mg 2 + < O 2 - < F - < N 3 -
  3. CAl 3 + < Mg 2 + < Na + < F - < O 2 - < N 3 -
  4. DN 3 - < F - < O 2 - < Mg 2 + < Na + < AI 3 +

Correct answer

C. Al 3 + < Mg 2 + < Na + < F - < O 2 - < N 3 -

Step-by-step solution

Al 3 + < Mg 2 + < Na + < F - < O 2 - < N 3 - All are isoelectronic species so more is the z of less will be the ionic size.

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