TS EAMCET · Chemistry · d and f Block Elements
Observe the following \(f\)-block elements \(\mathrm{Eu}(Z=63) ; \mathrm{Pu}(Z=94) ; \mathrm{Cf}(\mathrm{Z}=98) ; \mathrm{Sm}(\mathrm{Z}=62) ; \mathrm{Gd}\) \((\mathrm{Z}=64) ; \mathrm{Cm}(\mathrm{Z}=96)\) How many of the above have half-filled \(f\)-orbitals in their ground state?
- A \(3\)
- B \(4\)
- C \(2\)
- D \(5\)
Answer & Solution
Correct Answer
(A) \(3\)
Step-by-step Solution
Detailed explanation
\begin{array}{|c|c|c|} \hline \begin{array}{c} \text { Atomic } \\ \text { Number } \end{array} & \text { f-Block element } & \text { Electronic configuration } \\ \hline 63 & \mathrm{Eu} & {[\mathrm{Xe}] 4 \mathrm{f}^7 6 \mathrm{~s}^2} \\ \hline 94 & \mathrm{Pu} &…
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