Periodic Table of Elements

Element Francium - Fr

Comprehensive data on the chemical element Francium is provided on this page; including scores of properties, element names in many languages, most known nuclides of Francium. Common chemical compounds are also provided for many elements. In addition technical terms are linked to their definitions and the menu contains links to related articles that are a great aid in one's studies.

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Overview of Francium

Francium's Name in Other Languages

  • Latin: Francium
  • Czech: Francium
  • Croatian: Francij
  • French: Francium
  • German: Francium - s
  • Italian: Francio
  • Norwegian: Francium
  • Portuguese: Frâncio
  • Russian: Франций
  • Spanish: Francio
  • Swedish: Francium

Atomic Structure of Francium

Chemical Properties of Francium

Physical Properties of Francium

Regulatory / Health

  • CAS Number
    • 7440-73-5
  • NFPA 704
    • Health:
    • Fire:
    • Reactivity:
    • Special Hazard: Radioactive<
    • OSHA Permissible Exposure Limit (PEL)
      • No limits set by OSHA
    • OSHA PEL Vacated 1989
      • No limits set by OSHA
    • NIOSH Recommended Exposure Limit (REL)
      • No limits set by NIOSH
    • Levels In Humans:
      Note: this data represents naturally occuring levels of elements in the typical human, it DOES NOT represent recommended daily allowances.
      • Blood/mg dm-3: nil
      • Bone/p.p.m: nil
      • Liver/p.p.m: nil
      • Muscle/p.p.m: nil
      • Daily Dietary Intake: nil
      • Total Mass In Avg. 70kg human: nil

    Who / Where / When / How

    • Discoverer: Marguerite Perey
    • Discovery Location: Paris France
    • Discovery Year: 1939
    • Name Origin:
      Named after France.
    • Abundance of Francium:
      • Earth's Crust/p.p.m.: N/A
      • Seawater/p.p.m.: nil
      • Atmosphere/p.p.m.: N/A
      • Sun (Relative to H=1E12): N/A
    • Sources of Francium:
      Formed by decay of actinium. Chemical properties similar to cesium. Decays to radium or astatine. There is probably less than 30 grams of francium in the earth's crust at any one time. It is not commercially available.
    • Uses of Francium:
    • Additional Notes:
      Francium is never encountered normally, however, handling it would be very dangerous as it is a powerful source of alpha radiation.

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