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4 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 fran·ci·um /ˈfræn(t)siəm/

From: DICT.TW English-Chinese Medical Dictionary 英漢醫學字典

 fran·ci·um /ˈfræn(t)sɪəm/ 名詞

From: WordNet (r) 2.0

      n : a radioactive element of the alkali-metal group discovered
          as a disintegration product of actinium [syn: Fr, atomic
          number 87]

From: Elements database 20001107

 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.