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Periodic Table of Elements

Element Lawrencium - Lr

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

Lawrencium Menu

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

Overview of Lawrencium

• Atomic Number: 103
• Period: 7
• Series: Actinides

Lawrencium's Name in Other Languages

• Latin: Lawrentium
• Czech: Lawrencium
• Croatian: Lawrencij
• French: Lawrencium
• German: Lawrencium - s
• Italian: Lawrentio
• Norwegian: Lawrencium
• Portuguese: Laurêncio
• Russian: Лоуренсий
• Spanish: Lawrencio
• Swedish:

Atomic Structure of Lawrencium

• Atomic Radius:
• Atomic Volume:
• Covalent Radius:
• Cross Section (Thermal Neutron Capture) σ_a/barns:
• Crystal Structure:

• Electron Configuration:

  1s² 2s²p⁶ 3s²p⁶d¹⁰ 4s²p⁶d¹⁰f¹⁴ 5s²p⁶d¹⁰f¹⁴ 6s²p⁶d¹ 7s²

• Electrons per Energy Level: 2,8,18,32,32,9,2

  Shell Model
  

• Ionic Radius:
• Filling Orbital: 5f¹⁴
• Number of Electrons (with no charge): 103
• Number of Neutrons (most common/stable nuclide): 157
• Number of Protons: 103
• Oxidation States: 3
• Valence Electrons: 5f¹⁴ 6d¹ 7s²

Chemical Properties of Lawrencium

• Electrochemical Equivalent: 3.23g/amp-hr
• Electron Work Function:
• Electronegativity: 1.3 (Pauling); N/A (Allrod Rochow)
• Heat of Fusion: kJ/mol
• Incompatibilities:

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

Physical Properties of Lawrencium

• Atomic Mass Average: 260
• Boiling Point:
• Coefficient of lineal thermal expansion/K^-1: N/A
• Conductivity

  Electrical:
  Thermal: 0.1 W/cmK

• Description:

  Man made radioactive metal that does not occur in nature.

• Flammablity Class:
• Freezing Point: see melting point
• Heat of Vaporization: kJ/mol
• Melting Point:
• Physical State (at 20°C & 1atm):
• Specific Heat:

Regulatory / Health

• CAS Number
  • 22537-19-5
• 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: A.Ghiorso, T.Sikkeland, A.E. Larsh, R.M. Latimer
  • Discovery Location: Berkeley California United States
  • Discovery Year: 1961
  • Name Origin:

    Named after Ernest O. Lawrence.

  • Abundance of Lawrencium:
    • Earth's Crust/p.p.m.: nil
    • Seawater/p.p.m.: nil
    • Atmosphere/p.p.m.: nil
    • Sun (Relative to H=1E¹²): N/A
  • Sources of Lawrencium:

    Produced by bombarding californium-252 with boron nuclei or BK-249 with O-18 nuclei. Few atoms of Lawrencium have ever been produced.

  • Uses of Lawrencium:

    None

  • Additional Notes:

  Lawrencium Menu

  • Lawrencium Page One
    • Overview of Lawrencium
    • Lawrencium's Name in Other Languages
    • Atomic Structure of Lawrencium
    • Chemical Properties of Lawrencium
    • Physical Properties of Lawrencium
    • Regulatory / Health
    • Who/When/Where/How
  • Lawrencium 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.

  Related Resources

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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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  Kenneth Barbalace. Periodic Table of Elements - Lawrencium - Lr. EnvironmentalChemistry.com. 1995 - 2024. Accessed on-line: 12/21/2024
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