(D) is the correct answer. Terbium $(Tb)$ is a lanthanide element with atomic number $65$,belonging to the $4f$-series with the electronic configurati

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(D) is the correct answer. Terbium $(Tb)$ is a lanthanide element with atomic number $65$,belonging to the $4f$-series with the electronic configuration $[Xe] 4f^9 6s^2$. Curium $(Cm)$,Californium $(Cf)$,and Uranium $(U)$ are all members of the $5f$-series,which are known as actinides.

Class 12 Chemistry The d- and f-Block Elements Lanthanoids and Actinoids

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Which of the following is not an actinide?

A
Curium
B
Californium
C
Uranium
D
Terbium

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Class 12 Questions

Class 12

Chemistry Questions

Chapter

The d- and f-Block Elements

Subtopic

Lanthanoids and Actinoids

Which of the following properties is common to both lanthanoids and actinoids?

Easy

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Which series of elements are radioactive?

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Which element from the following has a half-filled $4f$ orbital in its observed ground state?

EasyMHT CET 2024

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Assertion : Ionisation enthalpies of the early actinoids are lower than for early lanthanoids.
Reason : $5f$ electrons are more effectively shielded from nuclear charge than $4f$ electrons.

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Which of the following elements shows the maximum number of different oxidation states in its compounds?

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Which of the following is not an actinide?

Similar Questions

Which of the following properties is common to both lanthanoids and actinoids?

Which series of elements are radioactive?

Which element from the following has a half-filled $4f$ orbital in its observed ground state?

Assertion : Ionisation enthalpies of the early actinoids are lower than for early lanthanoids.Reason : $5f$ electrons are more effectively shielded from nuclear charge than $4f$ electrons.

Which of the following elements shows the maximum number of different oxidation states in its compounds?

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Assertion : Ionisation enthalpies of the early actinoids are lower than for early lanthanoids.
Reason : $5f$ electrons are more effectively shielded from nuclear charge than $4f$ electrons.