Question

Assertion The ionic size of $Mg2+,>A{l}^{3+}$ Reason In isoelectronic species, greater the nuclear charge, less is the size.

• A. Both Assertion and Reason are true and Reason is the correct explanation of Assertion
• B. Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
• C. Assertion is true but Reason is false.
• D. Both Assertion and Reason are false.

Answer 1

Answer: (A)

The ionic size of $M{g}^{2+}$ is larger than $A{l}^{3+}$Both the species are isoelectronic arid in case of isoelectronic species as nuclear charge increases,{\,} attraction force between electron of ultimate shell and nucleus increases which results in decrease in ionic size.