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Fr francium.
Fr, symbol for the element francium. francium (Fr) [fran´se-um] a chemical element, atomic number 87, atomic weight 223. (See Appendix 6.)
FR framework region. Fr chemical symbol, francium. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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