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The d- and f-Block Elements — Chemistry STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceChemistryThe d- and f-Block Elements1 Mark
Question
What is called lanthanoid contraction?
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Answer

As the atomic number increases from La to Lu , there is a decrease in the atomic and ionic radii, this is called lanthanoid contraction.

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