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Question
Indicate the number of unpaired electrons in Kr.
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Solution
Krypton (Kr):
Atomic number = 36
The electronic configuration is:
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6
The orbital picture of krypton is:
Since all orbitals are fully occupied, there are no unpaired electrons in krypton.
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