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radium

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

definition Radium is a chemical element with symbol Ra and atomic number 88. Radium is an almost pure-white alkaline earth metal, but it readily oxidizes on exposure to air, becoming black in color. more like this
notation
02.01.20 more like this
Ra more like this
source http://en.wikipedia.org/wiki/Radium more like this
type
Resource original
Concept original
broader
http://resource.geosciml.org/classifier/cgi/commodity-code/metal original
narrower radium original
in scheme commodity-code original
is primary topic of radium