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promethium

http://resource.geosciml.org/classifier/cgi/commodity-code/promethium

definition

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.

notation

02.01.03.02.05
Pm

source

http://en.wikipedia.org/wiki/Promethium

type

Resource
Concept

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lree

	narrower	promethium

in scheme

commodity code

is primary topic of

promethium& properties=isPrimaryTopicOf