Commodity Code

silicon

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

definition Silicon is a chemical element with the symbol Si and atomic number 14. It is a tetravalent metalloid, less reactive than its chemical analog carbon, the nonmetal directly above it in the periodic table, but more reactive than germanium, the metalloid directly below it in the table. more like this
notation
02.02.05 more like this
Si more like this
source http://en.wikipedia.org/wiki/Silicon more like this
type
Resource
Concept
broader metalloid
narrower silicon
in scheme commodity code
is primary topic of silicon