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There are nine electrons in the 5f-orbit...

There are nine electrons in the 5f-orbital of an atom of an element. Mention the maximum number of electrons which have the same spin and number of unpaired electrons.

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5f-subshell contains 7 orbitals. According to Hund'r rule, the arrangement of 9 electron is shown below-

Thus, the maximum number of electrons with same spin will be 7 and number of unpaired electrons will be 5.
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