The electronic configurations of bivalent europium and trivalent cerium are
(atomic number : $Xe=54, Ce=58, Eu=63$ )
(atomic number : $Xe=54, Ce=58, Eu=63$ )
- A$[Xe] 4f^{4}$ and $[Xe] 4f^{9}$
- B$[Xe] 4f^{7}$ and $[Xe] 4f^{1}$
- C$[Xe] 4f^{7} 6s^{2}$ and $[Xe] 4f^{2} 6s^{2}$
- D$[Xe] 4f^{2}$ and $[Xe] 4f^{7}$
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Explain the lanthanoid contraction.
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View SolutionWhich among the following lanthanoids forms the most stable $+2$ oxidation state?
Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A$: $5f$ electrons can participate in bonding to a far greater extent than $4f$ electrons.
Reason $R$: $5f$ orbitals are not as buried as $4f$ orbitals.
In the light of the above statements,choose the correct answer from the options given below:
Assertion $A$: $5f$ electrons can participate in bonding to a far greater extent than $4f$ electrons.
Reason $R$: $5f$ orbitals are not as buried as $4f$ orbitals.
In the light of the above statements,choose the correct answer from the options given below:
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View SolutionWhich one amongst the following are good oxidizing agents?
$A.$ $Sm^{2+}$
$B.$ $Ce^{2+}$
$C.$ $Ce^{4+}$
$D.$ $Tb^{4+}$
Choose the most appropriate answer from the options given below:
$A.$ $Sm^{2+}$
$B.$ $Ce^{2+}$
$C.$ $Ce^{4+}$
$D.$ $Tb^{4+}$
Choose the most appropriate answer from the options given below:
What is the electronic configuration of $Ce$ $(Z = 58)$?
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