Americium
Data tables and historic information.
Britannica Nobel Prize: Americium
Overview and basic data.
ChemicalElements.com: Americium
Basic information, atomic structure, and isotopes.
EnvironmentalChemistry.com: Americium
Atomic structure, properties, and table of nuclides.
It's Elemental: Americium
Basic physical and historical information.
Lenntech: Americium
Physical data, chemical properties, health and environmental effects.
Visual Elements: Americium
Image, general and physical information, and key isotopes.
WebElements: Americium
Extensive information on history, uses, compounds, and properties.