Canadian Medical Guide > Chemicals and Drugs > Inorganic Chemicals > Elements > Elements, Radioactive > Promethium Terms and Definitions

Promethium

Medical Definition:	Promethium. A radioactive element of the rare earth family of metals. It has the atomic symbol Pm, atomic number 61, and atomic weight 147. It has been used in the construction of atomic batteries, in the preparation of self-luminous compounds, and as a beta-particle source for thickness gauges.
Guide Notes:	naturally radioactive; a rare earth metal; IM
CAS Type 1 Name:	CAS Number:	7440-12-2

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