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No, in Thorium (atom number 90, the first of actinides in the 7th period) none of the 90 electrons is unpaired.

All shells and sub-shells are evenly filled up: 2, 8, 18, 32, 18, 10, 2 .

1s2, 2s2 2p6, 3s2 3p6 3d10, 4s2 4p6 4d10 4f14, 5s2 5p6 5d10, 6s2 6p6 6d2, 7s2 .

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βˆ™ 13y ago
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βˆ™ 6mo ago

No, thorium does not have an unpaired electron. It has a +4 oxidation state and typically forms compounds with a 4+ charge.

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Q: Does thorium have an unpaired electron?
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