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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. [5] [6] [7]
Americium has an atomic number of 95 (the number of protons in the nucleus of the americium atom). ... Americium-243 has a mass of 243.06138 g/mol and a half-life of ...
{{Infobox element}}; labels & notes: (Image) GENERAL PROPERTIES Name Symbol Pronunciation (data central) Alternative name(s) Allotropes Appearance <element> IN THE PERIODIC TABLE Periodic table Atomic number Standard atomic weight (data central) Element category (also header bg color) (sets header bg color, over 'series='-color) Group Period ...
Americium (atomic number 95) was discovered in 1944-45 by Glenn T. Seaborg, Ralph A. James, Morgan, and Albert Ghiorso by bombarding plutonium-239, an isotope of plutonium, with high energy neutrons. This formed plutonium-240 , which was itself bombarded with neutrons, turning into plutonium-241 , which then decayed into americium-241 through ...
Similarly, americium (atomic number 95) was discovered in 1944–45 by Glenn T. Seaborg, James, Leon O. Morgan and Albert Ghiorso, working as part of the Manhattan Project. By bombarding plutonium neutrons in the 60-inch cyclotron at the University of California, Berkeley.
This is a list of chemical elements and their atomic properties, ordered by atomic number (Z).. Since valence electrons are not clearly defined for the d-block and f-block elements, there not being a clear point at which further ionisation becomes unprofitable, a purely formal definition as number of electrons in the outermost shell has been used.
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Americium-241 (241 Am, Am-241) is an isotope of americium. Like all isotopes of americium, it is radioactive , with a half-life of 432.2 years . 241 Am is the most common isotope of americium as well as the most prevalent isotope of americium in nuclear waste .