Francium (noun) Definition, Meaning & Examples

noun Chemistry.
  1. a radioactive element of the alkali metal group. Symbol: Fr; atomic number: 87.
noun
  1. an unstable radioactive element of the alkali-metal group, occurring in minute amounts in uranium ores. Symbol: Fr; atomic no: 87; half-life of most stable isotope, 223 Fr: 22 minutes; valency: 1; melting pt: 27°C; boiling pt: 677°C
Fr
    Francium (noun) Definition, Meaning & Examples

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