Periodic Table of Elements

Element Argon - Ar

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

Argon's Name in Other Languages

  • Latin: Argon
  • Czech: Argon
  • Croatian: Argon
  • French: Argon
  • German: Argon - r
  • Italian: Argo
  • Norwegian: Argon
  • Portuguese: Argônio
  • Russian: Аргон
  • Spanish: Argón
  • Swedish: Argon

Atomic Structure of Argon

Chemical Properties of Argon

Physical Properties of Argon

Regulatory / Health

  • CAS Number
    • 7440-37-1
  • UN/NA ID and ERG Guide Number
    • UN1006  
  • RTECS: CF2300000
  • 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: trace
    • Bone/p.p.m: nil
    • Liver/p.p.m: nil
    • Muscle/p.p.m: nil
    • Daily Dietary Intake: n/a
    • Total Mass In Avg. 70kg human: n/a

Who / Where / When / How

  • Discoverer: Sir William Ramsey, Lord Baron Rayleigh
  • Discovery Location: Bristol England (Ramsey)/London England (Rayleigh)
  • Discovery Year: 1894
  • Name Origin:
    Greek: Argos (inactive).
  • Abundance of Argon:
    • Earth's Crust/p.p.m.: 1.2
    • Seawater/p.p.m.: 0.45
    • Atmosphere/p.p.m.: 9300
    • Sun (Relative to H=1E12): 1000000
  • Sources of Argon:
    Argon makes up 1% of the air and is isolated by removing nitrogen, oxygen, carbon dioxide and water from air. Argon is constantly being formed from the radioactive decay of K-40 (an isotope of potassium). of radioactive potassium-40. World wide commercial production is around 700,000 tons per year.
  • Uses of Argon:
    Argon is used for lighting. It may also be used to provide an inert atmosphere for certain projects when explosion or other forms of oxidation may pose a problem. Also used in "Geiger" counters, which measure radiation levels.
  • 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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