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Question
What causes actinoid contraction?
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Solution
Actinoid contraction resulting from poor shielding by 5f electrons.
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RELATED QUESTIONS
Give a reason for the following:
Actinoids show irregularities in their electronic configurations.
Why do actinoids show a wide range of oxidation states?
Which is the last element in the series of the actinoids? Write the electronic configuration of this element. Comment on the possible oxidation state of this element.
Identify the CORRECT statement.
Actinoid series begins at ____________ and ends at ____________.
The actinoid contraction is attributed to the ____________.
The number of unpaired f-electrons in ytterbium (Z = 70) is ____________.
Which of the following oxidation state is common for all lanthanoids?
There are 14 elements in actinoid series. Which of the following elements does not belong to this series?
Assertion: Actinoids form relatively less stable complexes as compared to lanthanoids.
Reason: Actinoids can utilise their 5f orbitals along with 6d orbitals in bonding but lanthanoids do not use their 4f orbital for bonding.
