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What is lanrhanoid contraction

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What is lanrhanoid contraction

    • Posted by Vishnu Patel 5 years, 11 months ago

    CBSE > Class 12 > Chemistry
    • 2 answers

    Yogita Ingle 5 years, 11 months ago

    Lanthanoid contraction:

    • As we move along the lanthanoid series, the atomic number gradually increases by one or we can say number of electrons and protons increases by one.
    • Addition of electrons to the same shell increases the effective nuclear charge.
    • Increase in atomic number also increases the number of electrons in the 4f orbital having poor shielding effect due to which the effective nuclear charge upon the outer electrons also increases.
    • Therefore the size of lanthanoids steadily decreases with the increase in the atomic number and phenomenon is called lanthanoid
    • As a result of lanthanoid contraction there is a similarity in the properties of second and third transition series.

    0Thank You

    Vishnu Patel 5 years, 11 months ago

    Lanthonoid

    0Thank You

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