What is lanthanoid contraction
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The lanthanide contraction is the greater-than-expected decrease in ionic radii of the elements in the lanthanide series from atomic number 57, lanthanum, to 71, lutetium, which results in smaller than otherwise expected ionic radii for the subsequent elements starting with 72, hafnium.
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The steady decrease in atomic and ionic radii is known as lanthanoid contraction.
The steady decrease in atomic and ionic radii is known as lanthanoid contraction. This contraction is due to the fact that f - orbitals are not capable of providing effective shielding for the Valence electrons from nuclear attraction.
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The lanthanide contraction is the greater than expected decrease in the ionic radii of the elements in the Lanthanide series from atomic number 57 , lanthanum to 71, lutetium,which results in smaller then otherwise expected ionic radii for the subsequent element starting with 72, hafnium.
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