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Periodic Table of Elements

Element Radon - Rn

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

Radon Menu

• Radon Page One
  • Overview of Radon
  • Radon's Name in Other Languages
  • Atomic Structure of Radon
  • Chemical Properties of Radon
  • Physical Properties of Radon
  • Regulatory / Health
  • Who/When/Where/How
• Radon Page Two
  • Nuclides / Isotopes
  • Potential Parent Nuclides

Overview of Radon

• Atomic Number: 86
• Group: 18
• Period: 6
• Series: Noble Gasses

Radon's Name in Other Languages

• Latin: Radon
• Czech: Radon
• Croatian: Radon
• French: Radon
• German: Radon - r
• Italian: Radon
• Norwegian: Radon
• Portuguese: Radônio
• Russian: Радон
• Spanish: Radón
• Swedish: Radon

Atomic Structure of Radon

• Atomic Radius: 1.34Å
• Atomic Volume: 50.5cm³/mol
• Covalent Radius:
• Cross Section (Thermal Neutron Capture) σ_a/barns: 0.72
• Crystal Structure: Cubic face centered

  

• Electron Configuration:

  1s² 2s²p⁶ 3s²p⁶d¹⁰ 4s²p⁶d¹⁰f¹⁴ 5s²p⁶d¹⁰ 6s²p⁶

• Electrons per Energy Level: 2,8,18,32,18,8

  Shell Model
  

• Ionic Radius:
• Filling Orbital: 6p⁶
• Number of Electrons (with no charge): 86
• Number of Neutrons (most common/stable nuclide): 136
• Number of Protons: 86
• Oxidation States: 0
• Valence Electrons: 6s²p⁶

  Electron Dot Model
  

Chemical Properties of Radon

• Electrochemical Equivalent:
• Electron Work Function:
• Electronegativity: N/A (Pauling); 2.06 (Allrod Rochow)
• Heat of Fusion: 2.89kJ/mol
• Incompatibilities:

• Ionization Potential
  • First: 10.748
• Valence Electron Potential (-eV):

Physical Properties of Radon

• Atomic Mass Average: 222
• Boiling Point: 211K -62°C -80°F
• Coefficient of lineal thermal expansion/K^-1: N/A
• Conductivity

  Electrical:
  Thermal: 0.0000364 W/cmK

• Density: 9.73g/L @ 273K & 1atm
• Description:

  Colorless, odorless, tasteless radioactive noble gas. When cooled below its freezing point it brightly phosphoresces.

• Enthalpy of Fusion: 2.89 kJ/mole
• Enthalpy of Vaporization: 16.4 kJ/mole
• Flammablity Class:
• Freezing Point: see melting point
• Heat of Vaporization: 16.4kJ/mol
• Melting Point: 202K -71°C -96°F
• Molar Volume: 50.5 cm³/mole
• Physical State (at 20°C & 1atm): Gas
• Specific Heat: 0.09J/gK

Regulatory / Health

• CAS Number
  • 10043-92-2
• 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: virtually nil
    • Bone/p.p.m: virtually nil
    • Liver/p.p.m: virtually nil
    • Muscle/p.p.m: virtually nil
    • Daily Dietary Intake: nil
    • Total Mass In Avg. 70kg human: virtually nil

  Who / Where / When / How

  • Discoverer: Fredrich Ernst Dorn
  • Discovery Location: Halle Germany
  • Discovery Year: 1900
  • Name Origin:

    Named after the element radium

  • Abundance of Radon:
    • Earth's Crust/p.p.m.: N/A
    • Seawater/p.p.m.: 1E-14
    • Atmosphere/p.p.m.: 1E-15
    • Sun (Relative to H=1E¹²): N/A
  • Sources of Radon:

    Formed from the decay of radium in the earth's crust.

  • Uses of Radon:

    Used to treat some forms of cancer, also used in earthquake prediction.

  • Additional Notes:

    Radon is a health threat in homes built on granite and radon detectors should be used in the basement of homes. High radon levels can often be mitigated by utilizing ventilation.

  Radon Menu

  • Radon Page One
    • Overview of Radon
    • Radon's Name in Other Languages
    • Atomic Structure of Radon
    • Chemical Properties of Radon
    • Physical Properties of Radon
    • Regulatory / Health
    • Who/When/Where/How
  • Radon Page Two
    • Nuclides / Isotopes
    • Potential Parent Nuclides

  References

  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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  • Chemical Database
    This database focuses on the most common chemical compounds used in the home and industry.

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