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1
Description
Francium's atomic number is 87 and its symbol is Fr. It is extremely radioactive; its most stable isotope, francium-223, has a half-life of only 22 minutes. Bulk francium has never been seen, since the extreme heat of decay resulting from i...
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5.0
1 rating
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Beautiful Element Cube
Super clear and doesn’t stain. 10/10 would recommend to any buyer.