12th Class Chemistry The d-and f-Block Elements / d तथा f ब्लॉक के तत्व Question Bank 12th CBSE Chemistry The d-and f-Block Elements

  • question_answer
      Second ionisation enthalpy for Cr and Cu is unusually high. Explain.

    Answer:

      After losing one electron Cr possesses half filled and Cu possesses full filled d-orbital. So, it is difficult to remove electron from it further. So, 2nd ionisation enthalpy of Cu and Cr are unexpectedly high. .


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