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