Given below are two statements: Statement I: The second ionisation enthalpy of Na is larger than the corresponding ionisation enthalpy of Mg.

Question

Given below are two statements:

Statement I: The second ionisation enthalpy of Na is larger than the corresponding ionisation enthalpy of Mg.

Statement II: The ionic radius of $O^{2 -}$ is larger than that of $F^{-} .$

In the light of the above statements, choose the correct answer from the options given below: [2026]

Smart Achievers · Accepted Answer

(2)

${Na}^{+} : 1 s^{2} 2 s^{2} 2 p^{6} (fully filled electronic configuration)$

${Mg}^{+} : 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{1}$

${IE}_{2} of Na > {IE}_{2} of Mg$

$Size of O^{2 -} > F^{-}$

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