Shweta Thakur posted an Question
April 09, 2021 • 15:57 pm 30 points
  • IIT JAM
  • Chemistry (CY)

Sc,y,lu which has high inonization enthalpy

Sc,Y,Lu which has high inonization enthalpytnrkrk djdjfnrmlrnnrb

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    Priyanshu kumar best-answer

    I.E of Sc>Y>La Down the group size increases as number of shells increases. so force of attraction of nucleus on outermost electrons decreases and hence less energy is required to remove electrons and so IE decreases

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    Dinesh khalmaniya 1 Best Answer

    For IIIB group IP decrease from down the group as Sc > Y > La IP is inversely proportional to size so down the group it decrease. but for d block elements (except IIIB) 3d >4d <5d size of 4d and 5d will be compatible due to lanthanide contraction. but due to high zeff of 5d, Ip of 5d will be greater than 4d. for III B 3d > 4d > 5d.

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  • Amol ashok pawar best-answer

    helium has the largest first ionization energy, while francium has one of the lowest.

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