Can you list the original "Noble 9?"

Board 8

Board 8 » Can you list the original "Noble 9?"
LOLIAmAnAlt
06/17/2017
01:24 AM
#30
There are only 6

helium
neon
argon
krypton
xenon
radon
lllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll
lllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll
Board 8 » Can you list the original "Noble 9?"