Xenon, Helium or Neon Are Each This
Puzzle 13 of Periodic Table Medium Pack
Question is: Xenon, Helium or Neon Are Each This
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.