(B) The ground state electronic configuration of the given lanthanoids are:$(1)$ $La (Z=57): [Xe] 5d^1 6s^2$$(2)$ $Yb (Z=70): [Xe] 4f^{14} 6s^2$$(3)$

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(B) The ground state electronic configuration of the given lanthanoids are:$(1)$ $La (Z=57): [Xe] 5d^1 6s^2$$(2)$ $Yb (Z=70): [Xe] 4f^{14} 6s^2$$(3)$ $Eu (Z=63): [Xe] 4f^7 6s^2$$(4)$ $Gd (Z=64): [Xe] 4f^7 5d^1 6s^2$Among these, $Yb$ has a completely filled $4f$ orbital $(4f^{14})$.Therefore, the correct option is $B$.

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

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Which of the following elements has a completely filled $4f$ orbital in its ground state electronic configuration?

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A
$La$
B
$Yb$
C
$Eu$
D
$Gd$

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Class 12

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d-and f-Block Elements

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Lanthanoids and Actinoids

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Which of the following elements has a completely filled $4f$ orbital in its ground state electronic configuration?

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Which pair of ions among the following can be separated by the precipitation method?

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