091 Protactinium
091 Protactinium
089 Actinium090 Thorium091 Protactinium092 Uranium093 NeptuniumBlankBlankBlankBlankBlank059 Praseodymium091 Protactinium
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091.1
Uranium ore (inside a Revigator).
Astatine, francium, actinium, and protactinium are irritating to element collectors. It's customary to say that all the elements up to uranium (92) are the "naturally occurring" elements, while those beyond 92 are man-made. Collecting all the man-made elements is of course impossible, since there's an open-ended number of them of increasingly short half-life. So people like to define a "complete" element collection as one containing all the elements up to uranium.

The problem is that astatine, francium, actinium, and protactinium are absolutely impossible to collect in any meaningful sense of the word. They are so fantastically radioactive and short-lived that if you had a visible quantity of any of them, you would be dead and then it would vanish before your body was cold.

Radon is a bit like this too, but not nearly as bad: You can have a glass vial with a macroscopic quantity in it. (Of course, it's an invisible gas, so you can't actually see it.) Technetium is theoretically collectable: One isotope has a very long half-life (but good luck actually getting any).

But astatine, francium, actinium, and protactinium are in a whole other league of non-collectability.

The customary solution is to take a chunk of uranium ore and explain that there's probably a few atoms of the elements somewhere in it at any given time. Uranium ore is better than refined, purified uranium, because the elements are generated several steps down in the highly complex decay chain of uranium. The ore has an equilibrium concentration of these daughter products that took many thousands of years to build up.

This is why my Revigator, which contains quite a bit of carnotite uranium ore, probably has more astatine, francium, actinium, and protactinium in it than my depleted uranium metal samples, even though they have far more uranium in them.

Source: eBay seller bettyboop@iolaks.com
Contributor: Theodore Gray
Acquired: 13 November, 2002
Price: $90
Size: 12"
Purity: <0.1%
091.2
Sample from the Red Green and Blue Company Element Set.
The Red Green and Blue company in England sells a very nice element collection in several versions. Max Whitby, the director of the company, very kindly donated a complete set to the periodic table table.

To learn more about the set you can visit my page about element collecting for a general description or the company's website which includes many photographs and pricing details. I have two photographs of each sample from the set: One taken by me and one from the company. You can see photographs of all the samples displayed in a periodic table format: my pictures or their pictures. Or you can see both side-by-side with bigger pictures in numerical order.

For most sample from this set I have my own picture on the left and the one from the company here, but I haven't taken a picture of this sample yet so there's only one picture.

Source: Max Whitby of The Red Green & Blue Company
Contributor: Max Whitby of The Red Green & Blue Company
Acquired: 25 January, 2003
Price: Donated
Size: 0.2"
Purity: <0.2%
091.3
Sample from the Everest Element Set.
Up until the early 1990's a company in Russia sold a periodic table collection with element samples. At some point their American distributor sold off the remaining stock to a man who is now selling them on eBay. The samples (excepted gasses) weight about 0.25 grams each, and the whole set comes in a very nice wooden box with a printed periodic table in the lid.

Radioactive elements like this one are represented in this particular set by a non-radioactive dummy powder, which doesn't look anything like the real element. (In this case a sample of the pure element isn't really practical anyway.)

To learn more about the set you can visit my page about element collecting for a general description and information about how to buy one, or you can see photographs of all the samples from the set displayed on my website in a periodic table layout or with bigger pictures in numerical order.

Source: Rob Accurso
Contributor: Rob Accurso
Acquired: 7 February, 2003
Price: Donated
Size: 0.2"
Purity: 0%