The atomic and ionic radii $(M^{3+}$ ions$)$ of Lanthanide elements decrease with increase in atomic number. This effect is called as$:$
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The atomic and ionic radii $(M^{3+}$ ions$)$ of Lanthanide elements decrease with increase in atomic number.
This effect is called Lanthanoid contraction. This is due to poor shielding of $f$ electrons.
This effect is called Lanthanoid contraction. This is due to poor shielding of $f$ electrons.
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