EnvironmentalChemistry.com: Cerium (Popularity: )

Atomic structure, chemical and physical properties, and table of nuclides.

Visual Elements: Cerium (Popularity: )

Image, animation, uses, general and physical information, and key isotopes.

WebElements: Cerium (Popularity: )

Extensive information on history, uses, occurrence, compounds, and properties.

Wikipedia: Cerium (Popularity: )

Properties of the element, including its history, applications, and charateristics.

ChemicalElements.com: Cerium (Popularity: )

Basic information, atomic structure, and isotopes.

Lenntech: Cerium (Popularity: )

Physical data, chemical properties, health and environmental effects.

It's Elemental: Cerium (Popularity: )

Basic physical and historical information.