TS EAMCET · Chemistry · d and f Block Elements
The number f-electrons in +3 oxidation state of gadolinium \((Z=64)\) is \(x\) and in +2 oxidation state of Ytterbium \((\mathrm{Z}=70)\) is \(\mathrm{y}\). The sum of \(\mathrm{x}\) and \(\mathrm{y}\) is
- A \(13\)
- B \(20\)
- C \(18\)
- D \(21\)
Answer & Solution
Correct Answer
(D) \(21\)
Step-by-step Solution
Detailed explanation
The outer electronic configuration for \(\mathrm{Gd}\) and \(\mathrm{Yb}\) are:- \(\begin{aligned} & \mathrm{Gd}=4 f^7 5 \mathrm{~d}^1 6 \mathrm{~s}^2 \\ & \mathrm{Yb}=4 f^{14} 6 \mathrm{~s}^2 \end{aligned}\) Thus, \(\mathrm{Gd}^{3+}=4 f^7\) and \(\mathrm{yb}^{2+}=4 f^{14}\)…
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