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Periodic Table of Elements

Element Palladium - Pd

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

Palladium Menu

Overview of Palladium

Palladium's Name in Other Languages

  • Latin: Palladium
  • Czech: Palladium
  • Croatian: Paladij
  • French: Palladium
  • German: Palladium - s
  • Italian: Palladio
  • Norwegian: Palladium
  • Portuguese: Paládio
  • Russian: Палладий
  • Spanish: Paladio
  • Swedish: Palladium

Atomic Structure of Palladium

Chemical Properties of Palladium

Physical Properties of Palladium

  • Atomic Mass Average: 106.42
  • Boiling Point: 3237K 2964°C 5367°F
  • Coefficient of lineal thermal expansion/K-1: 11.2E-6
  • Conductivity
    Electrical: 0.095 106/cm Ω
    Thermal: 0.718 W/cmK
  • Density: 12.02g/cc @ 300K
  • Description:
    Soft silver-white metal that does not tarnish in air. It is attacked by concentrated, hot nitric acid and boiling sulfuric acid.
  • Elastic Modulus:
    • Bulk: 187/GPa
    • Rigidity: 43.6/GPa
    • Youngs: 121/GPa
  • Enthalpy of Atomization: 393.3 kJ/mole @ 25°C
  • Enthalpy of Fusion: 16.74 kJ/mole
  • Enthalpy of Vaporization: 376.6 kJ/mole
  • Flammablity Class: Non-combustible solid (except as dust)
  • Freezing Point: see melting point
  • Hardness Scale
    • Brinell: 37.3 MN m-2
    • Mohs: 4.75
    • Vickers: 461 MN m-2
  • Heat of Vaporization: 357kJ/mol
  • Melting Point: 1825K 1552°C 2826°F
  • Molar Volume: 8.85 cm3/mole
  • Optical Reflectivity: 72%
  • Physical State (at 20°C & 1atm): Solid
  • Specific Heat: 0.24J/gK
  • Vapor Pressure = 1.33Pa@1552°C

Regulatory / Health

  • CAS Number
    • 7440-05-3
  • 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: n/a
    • Bone/p.p.m: n/a
    • Liver/p.p.m: n/a
    • Muscle/p.p.m: n/a
    • Daily Dietary Intake: n/a
    • Total Mass In Avg. 70kg human: n/a
  • Discovery Year: 1803
  • Name Origin:
    Greek: Pallas goddess of wisdom and after the asteroid.
  • Abundance of Palladium:
    • Earth's Crust/p.p.m.: 0.0006
    • Seawater/p.p.m.:
      • Atlantic Suface: N/A
      • Atlantic Deep: N/A
      • Pacific Surface: 1.9E-08
      • Pacific Deep: 6.8E-08
    • Atmosphere/p.p.m.: N/A
    • Sun (Relative to H=1E12): 32
  • Sources of Palladium:
    Obtained with platinum, nickel, copper and mercury ores. Produced primarily as a by-product of copper and zinc refining. Annual world wide production is around 24 tons.
  • Uses of Palladium:
    Used in alloys for telecommunication equipment switching systems and electrical relays, catalyst for reforming cracked petroleum fractions, metallizing ceramics, mixed with gold to make "white gold" for jewelry, aircraft sparkplugs, etc.
  • Additional Notes:

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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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