francium definition

  • noun:
    • a very volatile radioactive element of the alkali metals, produced artificially from actinium or thorium, having approximately 19 isotopes, the absolute most stable which is Fr 223 with a half-life of 21 minutes. Atomic number 87; valence 1. See Table at element.
    • An extremely unstable radioactive element of the alkali metals, created unnaturally from actinium or thorium, having roughly 19 isotopes, more stable of which is Fr 223 with a half-life of 21 moments. Atomic number 87; valence 1. See Table at element.
    • A metallic substance element (symbol Fr) with an atomic few 87.
    • a radioactive section of the alkali-metal team discovered as a disintegration product of actinium
    • A metallic substance element (symbolization Fr) with an atomic wide range of 87.
    • a radioactive part of the alkali-metal team found as a disintegration product of actinium
    • an incredibly unstable radioactive section of the alkali metals, created artificially from actinium or thorium, having around 19 isotopes, the most stable that is Fr 223 with a half-life of 21 moments. Atomic number 87; valence 1. See Table at factor.
    • a very volatile radioactive section of the alkali metals, created unnaturally from actinium or thorium, having approximately 19 isotopes, many stable which is Fr 223 with a half-life of 21 mins. Atomic number 87; valence 1. See dining table at factor.
    • A metallic chemical element (expression Fr) with an atomic quantity of 87.
    • A metallic substance element (logo Fr) with an atomic quantity of 87.
    • a radioactive section of the alkali-metal group found as a disintegration item of actinium
    • a radioactive part of the alkali-metal group discovered as a disintegration product of actinium
    • an incredibly volatile radioactive part of the alkali metals, created unnaturally from actinium or thorium, having roughly 19 isotopes, more stable that is Fr 223 with a half-life of 21 minutes. Atomic quantity 87; valence 1. See dining table at factor.
    • A metallic chemical factor (logo Fr) with an atomic range 87.
    • a radioactive element of the alkali-metal team found as a disintegration product of actinium

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