Negara

Pm ( Promethium )

Keterangan

     Promethium is never normally encountered beyond a laboratory or the nuclear industry.

Nama lain (trademark, branding etc.)

Promethium, Prometij, Promethium - s, Promécio, Прометий, Prometium

Spesifikasi Produk

Overview of Promethium
Atomic Number 61
Period 6
Series Lanthanides
Relative Atomic Mass (12C=12.000)  145 (radioactive)
Boiling Point 3785K 3512°C 6354°F
Melting Point 1204K 931°C 1708°F
Density/kg m-3  7220 (298K)
Ground State Electron Configuration  [Xe]4f56s2
Electron Affinity(M-M-)/kJ mol-1  -50
Discoverer:  J.A. Marinsky, L.E. Glendenin, C.D. Coryell
Discovery Location:  Oak Ridge Tennessee United States
Discovery Year:  1945
Name Origin: From Prometheus who stole the fire of the sky and gave it to mankind.

Aplikasi

     Promethium is used in batteries as it can capture light in photocells and convert it into an electric current. Such batteries are used in watches, radios and guided-missile instruments. They are no larger than a drawing pin.

Bahan Baku

Promethium, originally prometheum, is a chemical element with the symbol Pm and atomic number 61. All of its isotopes are radioactive; it is one of only two such elements that are followed in the periodic table by elements with stable forms, a distinction shared with technetium. Chemically, promethium is a lanthanide, which forms salts when combined with other elements. Promethium shows only one stable oxidation state of +3; however, a few +2 compounds may exist.

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