Helium, Neon, Argon, Krypton, Radon, or Xenon
This page is the CodyCross answer for the clue below from Concert Hall, Group 594, Puzzle 4 (Chord Progression).
Question is: Helium, Neon, Argon, Krypton, Radon, or Xenon
and the answer is: NOBLEGAS
Word Meaning:
NOBLE GAS — (chemistry) Any of the elements of group 18 of the periodic table, being monatomic, usually inert (with very limited exceptions), and gaseous at familiar temperatures.
Definitions from Wiktionary.