Aluminium versus Aluminum
The different American spelling of what British English spells 'aluminium' sometimes cause puzzlement as to how it could have come about. This article tells that story.
Aluminum - Linked to Many Diseases in Humans
Provides many references on Aluminum's effect on humans and the environment.
ChemicalElements.com: Aluminum
Basic information, atomic structure, and table of isotopes.
It's Elemental: Aluminum
Basic physical and historical information.
Lenntech: Aluminum
Physical data, chemical properties, health and environmental effects.
USGS Minerals Information: Aluminum
Overview and a number of publications in PDF format.
Visual Elements: Aluminium
Image, animation, source, uses, key isotopes, and covalent bonds.
WebElements: Aluminum
Extensive information on history, uses, occurrence, compounds, and properties of the element.
Wikipedia: Aluminum
Details the properties of the element, including its history, applications, and characteristics.