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francium
(Fr) [fran´se-um]a chemical element, atomic number 87, atomic weight 223. (See Appendix 6.)
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Symbol for francium.
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francium.Fr
1 symbol for the element francium.
2 abbreviation for French scale.
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abbreviation for fixed ratio.
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Symbol for francium.
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Abbreviation for French scale.
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framework region.
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chemical symbol, francium.