Similar term(s): Am.
Americium is a silvery metal and a completely man-made
element whose 6 known isotopes are
Americium-241, the most common isotope, is formed spontaneously by the decay
of plutonium-241 and has a half-life of 430 years.
Trace quantities of americium are widely used in smoke detectors, for
Source: GreenFacts, based on 4engr.com
To read about this term in context:
GreenFacts Summary on the Chernobyl Nuclear Accident: