Promethium

Description

A radioactive, rare-earth element with an atomic number of 61. Prior to 1948, this element was called illinium. Promethium is a silvery-white metal that is recovered from spent uranium fission products. It is used in luminescent paint, x-ray sources and nuclear auxiliary power generators.

Synonyms and Related Terms

Pm; illinium

Risks

Strong radioactive poison.

Physical and Chemical Properties

Composition	Pm (atomic no. 61)
Melting Point	1160 C
Density	7.2 g/ml
Molecular Weight	atomic wt = 147