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STD 12 - 4. d and f- block elements — JEE STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 12 - 4. d and f- block elements4 Marks
MCQ
Lanthanide contraction occurs because
  • A
    $f-$ orbital electrons are easily lost
  • B
    $f-$ orbital an incompletely filled
  • C
    $f-$ orbital electron an poor shielders of nuclear charge
  • ✓
    $f-$ orbital do not come out on the surface of atom and are buried inside
✓

Answer

Correct option: D.
$f-$ orbital do not come out on the surface of atom and are buried inside
d
Lanthanide contraction occurs because f-orbital electron are poor shielders of nuclear charge.

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