This Noble Gas Keeps Balloons Afloat
This page is the CodyCross answer for the clue below from Transport, Group 108, Puzzle 4.
Question is: This Noble Gas Keeps Balloons Afloat
and the answer is: HELIUM
Word Meaning:
HELIUM — (uncountable) The second-lightest chemical element (symbol He), with an atomic number of 2 and atomic weight of 4.002602, a colorless, odorless and inert noble gas.
Definitions from Wiktionary.