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The Francium Price Mystery: Solved? - m1r8ew2
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The Francium Price Mystery: Solved? - nidea9a
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The Francium Price Mystery: Solved? - zaxteqg
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The Francium Price Mystery: Solved? - eq13e8n
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The Francium Price Mystery: Solved? - 4yufstv
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The Francium Price Mystery: Solved? - e04itra


Since one gramme of francium has never been observed, the billion per gramme is purely.