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It is also used in nuclear reactors and radiation shielding
and blimps
rarer elements become true focal points
explosives
This Flag in particular had a reaction with the acrylic and is difficult to see
Francium Cube Element Heritage Personal Museum It is also used inFrancium'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 its short half life would immediately vaporize any viewable quantity of the element. Named after the country it was discovered in, France. It was the last element first discovered in nature, rather than by synthesis.
