From the list given below,the number of lanth | vedclass

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(B) The lanthanides that exhibit the $+4$ oxidation state in their oxides are $Pr, Nd, Tb,$ and $Dy$.These elements show stability in the $+4$ state d

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$4$

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(B) The lanthanides that exhibit the $+4$ oxidation state in their oxides are $Pr, Nd, Tb,$ and $Dy$.These elements show stability in the $+4$ state due to configurations approaching the stable $4f^0$ or $4f^7$ configurations.Specifically,$PrO_2, NdO_2, TbO_2,$ and $DyO_2$ are known oxides where these elements exhibit the $+4$ oxidation state.Therefore,the total number of such elements is $4$.

From the list given below,the number of lanthanides which exhibit $+4$ oxidation state in their oxides is: $Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy$

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