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

CBSE BoardEnglish MediumSTD 12 ScienceChemistry4. d and f- block elements1 Mark
MCQ
The lanthanide contraction relates to
  • A
    Atomic radii
  • ✓
    Atomic as well as ${M^{3 + }}$ radii
  • C
    Valence electrons
  • D
    Oxidation states
✓

Answer

Correct option: B.
Atomic as well as ${M^{3 + }}$ radii
b
(b)The lanthanide contraction relates to atomic as well as ${M^{3 + }}$ radii in which the regular decrease in the size of lanthanoid ion from $L{a^{3 + }}$ to $L{u^{3 + }}$are found.

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