Which of the following pairs show +2 oxidatio | vedclass

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Question

(B) The general oxidation state of lanthanoids is $+3$. However,some lanthanoids exhibit $+2$ or $+4$ oxidation states due to stable electronic config

Vedclass · Accepted Answer

$_{63}Eu$ and $_{70}Yb$

Vedclass · Answer

(B) The general oxidation state of lanthanoids is $+3$. However,some lanthanoids exhibit $+2$ or $+4$ oxidation states due to stable electronic configurations (half-filled or fully-filled $f$-orbitals). $Eu$ $(Z = 63)$ has the configuration $[Xe] 4f^7 6s^2$. By losing two electrons,it forms $Eu^{2+}$ $(4f^7)$,which is stable due to the half-filled $f$-subshell. $Yb$ $(Z = 70)$ has the configuration $[Xe] 4f^{14} 6s^2$. By losing two electrons,it forms $Yb^{2+}$ $(4f^{14})$,which is stable due to the fully-filled $f$-subshell. Therefore,the pair showing $+2$ oxidation state is $_{63}Eu$ and $_{70}Yb$.

Which of the following pairs show $+2$ oxidation state?

Similar Questions

What is the effect of lanthanoid contraction in the lanthanoid series of elements with increasing atomic number?

Which one of the following statements concerning lanthanide elements is false?

Fill in the blanks:
$1.$ The size of $M^{3+}$ ions in the actinoid series ........... with an increase in atomic number.
$2.$ The common oxidation state of elements in the actinoid series is .......... .
$3.$ The appearance of elements in the actinoid series is like .......... .

Which 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:

Which lanthanoid element has the electronic configuration $[Xe]4f^7 5d^1 6s^2$?

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