90% of Jupiter's Atmosphere Is Made Up of This Gas

This page is the CodyCross answer for the clue below from The Netherlands, Group 2115, Puzzle 4 (Almere and Nijmegen).

Question is: 90% of Jupiter's Atmosphere Is Made Up of This Gas

and the answer is: HYDROGEN

Word Meaning:

HYDROGEN — (uncountable) The lightest chemical element (symbol H), with an atomic number of 1 and atomic weight of 1.008.

Definitions from Wiktionary.

90% Of Jupiter's Atmosphere Is Made Up Of This Gas - The Netherlands CodyCross Answers | CodyCross Solutions