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MHT CET202619 April 2026Evening ShiftChemistryd and f Block ElementsActual

Which from following is NOT an inner transition element ?

Options

  1. ARf
  2. BAc
  3. CLu
  4. DHo

Correct answer

A. Rf

Step-by-step solution

Inner transition elements are the f-block elements, which include the lanthanides (atomic numbers 58 to 71 ) and actinides (atomic numbers 90 to 103 ). Sometimes, Lanthanum ( Z=57 ) and Actinium ( Z=89 ) are also studied along with them due to their similar properties. Ho (Holmium, Z=67 ) and Lu (Lutetium, Z=71 ) belong to the lanthanide series. Ac (Actinium, Z=89 ) is the prototype of the actinide series. Rf (Rutherfordium, Z=104 ) is a transactinide element. It belongs to Group 4 and Period 7 of the periodic tabl

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