File:Protactinium (Element - 91) 2.jpg
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Summary
| Description |
English: Protactinium (Pa) is # 91 on the Periodic Table of Elements. Elemental protactinium is a radioactive, silvery-gray metal. Twenty-nine isotopes of protactinium are known - three occur naturally. Almost all Pa is protactinium-231. Protactinium-233 and protactinium-234 occur in trace amount only.
Info. at: en.wikipedia.org/wiki/Protactinium and en.wikipedia.org/wiki/Isotopes_of_protactinium |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/54041583415/ |
| Author | James St. John |
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/54041583415. It was reviewed on 24 November 2024 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. | 
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 13:02, 24 November 2024 | | 1,562 × 1,253 (1.3 MB) | wikimediacommons>Ser Amantio di Nicolao | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/54041583415/ with UploadWizard |
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