The Periodic Table of Elements
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95
Am
Americium
Summary
Americium is a radioactive transuranic chemical element with symbol Am and atomic number 95. This member of the actinide series is located in the periodic table under the lanthanide element europium, and thus by analogy was named after the Americas. Americium was first produced in 1944 by the group of Glenn T.Seaborg from Berkeley, California, at the metallurgical laboratory of University of Chicago.
Block: f
Period: 7
Group: 3
Atomic Mass: 243 g/mol (amu)
Discovered By: Glenn T. Seaborg
Phase: Solid
Boiling Point: 2880 K
Melting Point: 1449 K
Type: actinide
Density: 12 g/cm3
Electron Configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f7
Electron Configuration (Semantic): [Rn] 5f7 7s2