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The d & f Block Elements — Chemistry STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceChemistryThe d & f Block Elements1 Mark
MCQ
Variable valency of transition elements is on account of:
  • A
    Incomplete s - orbitals.
  • B
    Incomplete d - orbitals.
  • C
    Completely filled d - orbitals.
  • D
    Incomplete p - orbitals.
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