2804: Hydrogen, rare gases and other non-metals.
Total
28
Children
280410: Hydrogen
280421: Argon
280429: Rare gases other than argon
280430: Nitrogen
280440: Oxygen
280450: Boron; tellurium
280461: Silicon, containing by weight not <99.99% of silicon
280469: Silicon, containing by weight <99.99% of silicon
280470: Phosphorus
280480: Arsenic
280490: Selenium
Corresponds to
No mappings available
Translates to: