Americium

Radioactive element of the actinide series.


Symbol
Am

Discovered
First synthesized in a series of successive neutron capture reactions in the element plutonium, 239Pu, in a nuclear reactor in 1944 by American scientists under Glenn T. Seaborg at the University of California lab in Berkeley, California.

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Atomic number 95 Clip
Atomic / Molecular Weight 243.0614 gmol-1Clip
Density 13670 kgm-3Clip
Lattice constant 347 fmClip
Melting Point 1263 KClip
Boiling Point 2873 KClip
Specific heat capacity 140 Jkg-1K-1Clip
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See also: Curium, Periodic Table.

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Subjects: Chemistry