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NEETChemistryd and f Block Elements

What is the range of atomic numbers affected by the lanthanoid contraction?

Options

  1. ALanthanum to lutetium
  2. BScandium to zinc
  3. CSodium to potassium
  4. DBarium to radium

Correct answer

A. Lanthanum to lutetium

Step-by-step solution

The overall decrease in atomic and ionic radii from lanthanum to lutetium (the lanthanoid contraction) is a unique feature in the chemistry of the lanthanoids.

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