The electronic configurations of $Eu$ (Atomic No. $63$),$Gd$ (Atomic No. $64$) and $Tb$ (Atomic No. $65$) are
- A$[Xe]4f^6 \, 5d^1 \, 6s^2, [Xe]4f^7 \, 5d^1 \, 6s^2$ and $[Xe]4f^8 \, 5d^1 \, 6s^2$
- B$[Xe] \, 4f^7 \, 6s^2, [Xe] \, 4f^7 \, 5d^1 \, 6s^2$ and $[Xe] \, 4f^9 \, 6s^2$
- C$[Xe] \, 4f^7 \, 6s^2, [Xe] \, 4f^8 \, 6s^2$ and $[Xe] \, 4f^8 \, 5d^1 \, 6s^2$
- D$[Xe] \, 4f^6 \, 5d^1 \, 6s^2, [Xe] \, 4f^7 \, 5d^1 \, 6s^2$ and $[Xe] \, 4f^9 \, 6s^2$
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Which actinoid elements have a $5f^{14}$ electronic configuration in their atoms?
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View SolutionWhich one of the lanthanoids given below is the most stable in divalent form?
Given below are two statements:
Statement $I$: $CeO_{2}$ can be used for the oxidation of aldehydes and ketones.
Statement $II$: Aqueous solution of $EuSO_{4}$ is a strong reducing agent.
In the light of the above statements,choose the correct answer from the options given below:
Statement $I$: $CeO_{2}$ can be used for the oxidation of aldehydes and ketones.
Statement $II$: Aqueous solution of $EuSO_{4}$ is a strong reducing agent.
In the light of the above statements,choose the correct answer from the options given below:
On which factors does the stability of an oxidation state in Lanthanoid elements depend?
Which element from the following has a half-filled $4f$ orbital in its observed ground state?
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