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What is Lanthanoid Contraction? Write The............. - Chemistry

Short Note

What is lanthanoid contraction? Write the.............

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Solution

The regular decrease in atomic and ionic radii from lanthanum to lutetium with increasing atomic number is called lanthanoid contraction. 
Consequences : 
The net result of the lanthanoid contraction is that the second and third d-series exhibit similar radii 
Zr =160 pm
and Hf = 159pm 
They have very similar physical and chemical properties. 

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