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Introduction to d and f Block Elements

Electronic co...

Question

Electronic configuration of Gd(64) is written as: ${[X e]}_{54}$ ${4 f}^{x} {5 d}^{1} {6 s}^{2}$ , then the value of x is 7. If true enter 1, else enter 0.

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Solution

In this EC all the electrons in ${4 f}^{7}$ are unpaired and thus is stable by half fill rule
$↑$
$↑$
$↑$
$↑$ $↑$ $↑$ $↑$
${4 f}^{7}$

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