Americium

Americium is a chemical element in the periodic table with the symbol Am and atomic number 95. All isotopes of this man-made element are radioactive.

Small amounts of the radioactive isotope Americium-241 are often used in household smoke detectors[?].

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External Link: Los Alamos National Laboratory's Chemistry Division: Periodic Table - Americium

http://pearl1.lanl.gov/periodic/elements/95

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See: Periodic Table