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

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryThe d & f Block Elements1 Mark
MCQ
Differentiating electron in inner transition elements enters the $.......$ orbital.
  • A
    $s$
  • B
    $p$
  • C
    $d$
  • ✓
    $f$
✓

Answer

Correct option: D.
$f$
In inner transition elements, the differentiating electron enters into $f$ orbitals. So these elements are called $f-$block elements.
The $'f\ ’ –$ block elements are also known by the name of inner transition elements. In these elements, the last electron usually enters the penultimate i.e. $(n – 2) f$ of the orbital.

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