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Which of the following have no 6d electrons in their configuration?
A) Plutonium B) Neptunium C) Curium D) Einsteinium

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A and B

B and C

C and D

A and D

answer is D.

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Detailed Solution

Plutonium $5 f^{6} 7 s^{2}$
Neptunium $5 f^{4} 6 d^{1} 7 s^{2}$
Curium $5 f^{7} 6 d^{7} 7 s^{2}$
Eienstenium $5 f^{11} 7 s^{2}$

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