Americium

Americium

Americium (/ˌæməˈrɪʃiəm/ am-ə-RISH-ee-əm) is a synthetic chemical element with the symbol Am and atomic number 95. It is a transuranic member of the actinide series, in the periodic table located under the lanthanide element europium, and thus by analogy was named after the Americas.

Etymology

The name Americium is derived from America, as it is a member of the actinide series named in a similar fashion to its group neighbor, Europium. The element was first produced in 1944 by the group of Glenn T. Seaborg at the University of California, Berkeley.

Properties

Americium is a radioactive and silvery metal. Its common isotopes are Am-241 and Am-243, which are used in commercial ionization chamber smoke detectors and industrial gauges.

Related Terms

• Actinide series
• Atomic number
• Chemical element
• Europium
• Glenn T. Seaborg
• Ionization chamber
• Isotopes
• Radioactive
• Smoke detectors
• Transuranic
• University of California, Berkeley

External links

• Medical encyclopedia article on Americium
• Wikipedia's article - Americium

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