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Question: Answered & Verified by Expert
Assertion : The ionic radii of the alkaline earth metals are smaller than those of alkali metals in the same period.
Reason : Alkali metals have higher nuclear charge than that of the alkaline earth metals.
The correct option among the following is
Chemistrys Block ElementsTS EAMCETTS EAMCET 2022 (20 Jul Shift 2)
Options:
  • A (A) is true, (R) is true and (R) is the correct explanation for (A)
  • B (A) is true, (R) is true but (R) is not the correct explanation for (A)
  • C (A) is true but (R) is false
  • D (A) is false but (R) is true
Solution:
2913 Upvotes Verified Answer
The correct answer is: (A) is true but (R) is false
Alkali metals are in Gr1 and alkaline earth metals are in $\mathrm{Gr} 2$ of the periodic table. Gr2 elements are smaller and heavier than Gr1 elements as the nuclear charge increases and one electron is added to the same outermost shell.

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