Which of the Following Best Describes the Lanthanide Contraction

question 2

Multiple Choice

Which of the following best describes the lanthanide contraction?

• A) f-orbitals are more directional than d-orbitals and therefore less effective at screening nuclear charge
• B) f-orbitals are more diffuse than d-orbitals and therefore less effective at screening nuclear charge
• C) the increase in atomic and ionic radii as one goes from left to right across the lanthanides
• D) A and C
• E) B and C

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