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