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What is Lanthanoid contraction?

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What is Lanthanoid contraction?

    • Posted by Sakshi Shrivastava 8 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 2 answers

    Srishti Thakur 8 years, 3 months ago

    The 4th-electrons have poor shielding effect,so effective nuclear charge experienced by the outer electrons increases.This result in a steady decrease in size of lanthanides. This is known as lanthanoid contraction

    1Thank You

    Jayash Pandey 8 years, 3 months ago

    Contraction means the decrease in size. So, lanthanide contraction means the decrease in size of the elements down the group(lanthanide).

    1Thank You

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