Americium is a radioactive element that was discovered in 1944 by scientists at the University of California, Berkeley. It is a synthetic element with atomic number 95 and is part of the actinide series. Americium is a soft, silvery-white metal that is
From Wikipedia
Americium is a synthetic chemical element; it has symbol Am and atomic number 95. It is radioactive and a transuranic member of the actinide series in the periodic table, located under the lanthanide element europium and was thus named after the Americas by analogy.