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Top 20 Directory:
Top : Science : Chemistry : Elements : Thulium
See Also:
Sites:
  		• ChemGlobe: Thulium: Electronic, thermal, and steric data along with an isotope table.
  		• ChemicalElements.com: Thulium: Basic information, atomic structure, and isotopes.
  		• EnvironmentalChemistry.com: Thulium: Atomic structure, chemical and physical properties, and table of nuclides.
  		• It's Elemental: Thulium: Basic physical and historical information.
  		• LANL: Thulium: Basic information and history.
  		• Lenntech: Thulium: Physical data, chemical properties, health and environmental effects.
  		• Thulium: Data tables and historic information.
  		• Visual Elements: Thulium: Image, uses, physical information, and ionisation energies.
  		• WebElements: Thulium: Extensive information on history, uses, occurrence, compounds, and properties.
  		• Wikipedia: Thulium: Properties of the element, including its history, applications, and characteristics.
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