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Properties of Metals - Metallurgy
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Non-Commercial Reseach Identification - Source Bibliography
Promethium
Atomic Number: 61
Symbol: Pm
Atomic Weight: 144.9127
Element Classification: Rare Earth Element (Lanthanide Series)
Discoverer: J.A. Marinsky, L.E. Glendenin, C.D. Coryell
Discovery Date: 1945 (United States)
Name Origin: Named for the Greek god, Prometheus
Density (g/cc): 7.2
Melting Point (K): 1441
Boiling Point (K): 3000
Covalent Radius (pm): 163
Ionic Radius: 97.9 (+3e)
Specific Heat (@20°C J/g mol): 0.185
Pauling Negativity Number: 0.0
First Ionizing Energy (kJ/mol): 536
Oxidation States: 3
Electronic Configuration: [Xe] 4f5 6s2
References: Los Alamos National Laboratory (2001), Crescent Chemical Company (2001)
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Designed by Nigel G Wilcox
Ref: P61
Elements - Alphabetical:
[A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Y] [Z]
[P19] [P46] [P78] [P59] [P61] [P91] P94] [P15] [P84]
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