Commodity Code

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
Concept
broader metal
narrower radium
in scheme commodity code
is primary topic of radium