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2. What element has 81 protons in the nuclei of its atoms? A. Thallium B. Lead C. Platinum D. Uranium
Thallium has 81 protons in the nuclei of its atoms.
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Expert answered|Score 1|alfred123|Points 128113|
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Asked 10/18/2018 11:09:54 AM
Updated 5/7/2020 7:09:52 PM
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Confirmed by yumdrea [5/7/2020 7:09:52 PM]
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