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Promethium

A radioactive element of the rare earth series.

Symbol: Pm

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Atomic number	61		Clip
Atomic / Molecular Weight	144.9128	gmol^-1	Clip
Density	7220	kgm^-3	Clip
Lattice constant	365	fm	Clip
Melting Point	1441	K	Clip
Boiling Point	3573	K	Clip
Specific heat capacity	184	Jkg^-1K^-1	Clip

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See also: Periodic Table.

Subjects: Chemistry