-- card: 36890 from stack: in
-- bmap block id: 0
-- flags: 0000
-- background id: 14320
-- name: Fr


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Fr

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Francium

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87

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(223)

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27

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677

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+1

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(France) Discovered in 1939 by Marguerite Perey of the Curie Institute in Paris, France. Found in uranium minerals, and can be made artificially by bombarding thorium with protons. 

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alkali metal, radioactive, highly unstable, 20 isotopes, the longest lived isotope is Fr-223 with a half-life of 22 minutes

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Electron Configuration:

1s  2s  2p  3s  3p  3d  4s  4p  4d  4f  5s  5p  5d  5f  6s  6p  6d  6f  7s 
 2   2    6    2    6   10   2   6  10  14  2    6  10         2    6              1