Difficult
Assertion : Atomic radius of gallium is higher than that of aluminium.
Reason : The presence of additional $d$-electrons offers poor screening effect for the outer electrons from increased nuclear charge.
Reason : The presence of additional $d$-electrons offers poor screening effect for the outer electrons from increased nuclear charge.
- AIf the Assertion is correct but Reason is incorrect.
- BIf both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
- CIf both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
- DIf both the Assertion and Reason are incorrect.
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Similar Questions
In case of isoelectronic species,the size of $F^{-}$,$Ne$,and $Na^{+}$ is affected by:
DifficultJEE MAIN 2024
View SolutionGiven below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$:
Assertion $A$: The ionic radii of $O^{2-}$ and $Mg^{2+}$ are same.
Reason $R$: Both $O^{2-}$ and $Mg^{2+}$ are isoelectronic species.
In the light of the above statements,choose the correct answer from the options given below:
Assertion $A$: The ionic radii of $O^{2-}$ and $Mg^{2+}$ are same.
Reason $R$: Both $O^{2-}$ and $Mg^{2+}$ are isoelectronic species.
In the light of the above statements,choose the correct answer from the options given below:
Explain why cations are smaller and anions larger in radii than their parent atoms.
Medium
View SolutionWhich one of the following indicates the correct order of atomic size?
Medium
View SolutionThe ions $S^{2-}, Cl^{-}, K^{+}, Ca^{2+}$ are isoelectronic. Their ionic radii show
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