Periodic Table of Elements: Actinium - Ac (

Periodic Table of Elements

Element Actinium - Ac

Comprehensive data on the chemical element Actinium is provided on this page; including scores of properties, element names in many languages, most known nuclides of Actinium. 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 Actinium

Actinium's Name in Other Languages

  • Latin: Actinium
  • Czech: Aktinium
  • Croatian: Aktinij
  • French: Actinium
  • German: Aktinium - s
  • Italian: Attinio
  • Norwegian: Actinium
  • Portuguese: Actínio
  • Russian: Актиний
  • Spanish: Actínio
  • Swedish: Aktinium

Atomic Structure of Actinium

Chemical Properties of Actinium

Physical Properties of Actinium

Regulatory / Health

  • CAS Number
    • 7440-34-8
  • 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: André Debierne
    • Discovery Location: Paris France
    • Discovery Year: 1899
    • Name Origin:
      Greek: aktinos (ray).
    • Abundance of Actinium:
      • 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 Actinium:
      Extremely rare, found in all uranium ores. Usually obtained by treating radium with neutrons in a reactor. Total world production probably less than one gram.
    • Uses of Actinium:
      Used as a source of neutrons and for thermoelectric power. Not commercially available.
    • Additional Notes:

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    A list of reference sources used to compile the data provided on our periodic table of elements can be found on the main periodic table page.

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