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English Dictionary: francium by the DICT Development Group
2 results for francium
From WordNet (r) 3.0 (2006) [wn]:
  1. a radioactive element of the alkali-metal group discovered as a disintegration product of actinium
    Synonym(s): francium, Fr, atomic number 87
From The Elements (22Oct97) [elements]:
   Symbol: Fr
   Atomic number: 87
   Atomic weight: (223)
   Radioactive element, belongs to group 1 of the periodic table. Found in
   uranium and thorium ores. The 22 known isotopes are all radioactive, with
   the most stable being Fr-223. Its existence was confirmed in 1939 by
   Marguerite Perey.
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