Which is not the correct statement? (At. nos. | vedclass

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(A) The electronic configuration of $Yb$ $(Z=70)$ is $[Xe] 4f^{14} 6s^2$. Thus,$Yb^{3+}$ has the configuration $[Xe] 4f^{13}$. Since it has an unpaire

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Colour of $Yb^{3+}$ ion is pink.

Vedclass · Answer

(A) The electronic configuration of $Yb$ $(Z=70)$ is $[Xe] 4f^{14} 6s^2$. Thus,$Yb^{3+}$ has the configuration $[Xe] 4f^{13}$. Since it has an unpaired electron,it should be paramagnetic,but $Yb^{3+}$ ions are colorless in aqueous solution because the $f-f$ transitions are not observed in the visible region. Therefore,the statement that $Yb^{3+}$ is pink is incorrect.

Which is not the correct statement? (At. nos. $Ce = 58, Lu = 71, La = 57, Yb = 70$)

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