Distinguish Between Lanthanoid and Actinoids. - Chemistry

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Distinguish Between

Distinguish between lanthanoid and actinoids.

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Solution

Lanthanoids Actinoids
Differentiating electron enters 4f orbitals Differentiating electron enters 5f orbitals
Belong to the sixth period and form part of the third transition series. They constitute the first inner transition series. Belong to the seventh period and form part of the fourth transition series. They constitute the second inner transition series.
Binding energy of 4f orbitals is higher. Binding energy of 5f orbitals is lower.
Besides the +3 oxidation state, lanthanoids show +2 and + 4 oxidation states in few cases. Besides the +3 oxidation state, actinoids show higher oxidation states such as +4, +5 and +7.
They show lesser tendency to form complexes. They show greater tendency to form complexes.
Some of the lanthanoids are fairly coloured. Most of the ions of actinoids are deeply coloured. Examples: U3+ (red), U4+ (green)
Only promethium is radioactive. All the members of this series are radioactive.
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2014-2015 (October)

RELATED QUESTIONS

How would you account for the following:

The chemistry of actinoids is more complicated as compared to lanthanoids.


Give a reason for the following: 

Actinoids show irregularities in their electronic configurations.


How would you account for the following : Actinoid contraction is greater than lanthanoid contraction.


Why do actinoids show a wide range of oxidation states?


Write on similarity between the chemistry of lanthanoids and actinoids.


With reference to structural variability and chemical reactivity, write the differences between lanthanoids and actinoids


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.


Compare the chemistry of the actinoids with that of lanthanoids with reference to electronic configuration


Compare the chemistry of the actinoids with that of lanthanoids with reference to oxidation states


Compare the chemistry of the actinoids with that of lanthanoids with reference to chemical reactivity.


Write four points of distinction between Lanthanoids and Actinoids.


What is the position of actinoids in periodic table ?


How would you account the following :

Highest fluoride of Mn is MnF4 whereas the highest oxide is Mn2O7.


Give reasons for the following:
The chemistry of actinoids elements is not so smooth as that of the lanthanoids.


Choose the most correct option.

In which of the following series all the elements are radioactive in nature?


Manganese in the +2 oxidation state is more stable than +3 oxidation state where as iron is stable at +3 oxidation state than +2 oxidation state. Explain why?


Which of the following actinoids exhibits only + 3 oxidation state?


Which of the following actinoids shows +6 oxidation state?


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 ____________.


The highest oxidation state in plutonium (At. no. = 94) is ______.


The electronic configuration of Ux+ ion is [Rn]. What is the value of x?

[At. No. of U = 92]


Which among the following actinoids exhibits highest oxidation state +7?


Which of the following properties is NOT of actinoids?


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.


The incorrect statement among the following is: 


What is actinoid contraction?


Why do actinoids show variable oxidation states?


What are actinoids? Give their general electronic configuration.


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