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MHT CET202619 April 2026Evening ShiftChemistryd and f Block ElementsActual

Which element from following is NOT regarded as transition element ?

Options

  1. ACu
  2. BSc
  3. CCd
  4. DAu

Correct answer

C. Cd

Step-by-step solution

A transition element is defined as an element that has an incompletely filled d-orbital in its ground state or in any of its common oxidation states. Cadmium ( Cd ) belongs to group 12 and has the ground state electronic configuration [ Kr ] 4d¹⁰ 5s² . In its common oxidation state of +2 , its configuration is [ Kr ] 4d¹⁰ . Since the d-orbitals are completely filled in both its ground state and its stable oxidation state, Cd is not regarded as a transition element. Copper ( Cu ) and Gold ( Au ) have incompletely fi

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