Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEET2014ChemistryClassification of Elements and Periodicity in PropertiesActual

Which of the following orders of ionic radii is correctly represented?

Options

  1. AH - > H + > H
  2. BN a + > F - > O 2 -
  3. CF - > O 2 - − > Na +
  4. DAl 3 + > Mg 2 + > N 3 -

Correct answer

A. H - > H + > H

Step-by-step solution

Isoelectronic species refers to two atoms, ions or molecules that have the same electronic structure. For isoelectronic species, ionic radii decrease with increase in nuclear charge (i.e., no. of protons). Thus, the cation with greater + ve charge will have a smaller radius and the anion with greater - ve charge will have a larger radius. Na + ,   F − ,   O − 2 ,   Al 3 + ,   Mg 2 +   and   N 3 - are isoelectronic. Hence, the order of their ionic radius is N 3 - > O 2 -

Practice Classification of Elements and Periodicity in Properties on Quantrex Academy →

More from Classification of Elements and Periodicity in Properties

Match the following List I List II A. Technetium I. Non-metal B. Fluorine II. Transition metal C. Tellurium III. Lanthanoid D. Dysprosium IV. Metalloid 2026Which of the following properties increases from fluorine to iodine in group? 2026Identify the metalloid element from the following. 2026Which among the following elements does NOT exhibit -2 oxidation state? 2026Which has the maximum electropositive character? 2026The hydride with lowest acid strength among the following is 2026Among the following options, the correct trend in the electron gain enthalpy is 2026Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R . Assertion A : The first ionization enthalpy of O is lower than that of N and 2026 Full Classification of Elements and Periodicity in Properties list All NEET PYQs