This Noble Gas Keeps Balloons Afloat
This page is the CodyCross answer for the clue below from Transport, Group 108, Puzzle 4.
Question
This Noble Gas Keeps Balloons Afloat
Answer
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.