Gas That Constitutes Almost 80% of Earth's Air
This page is the CodyCross answer for the clue below from Science Lab, Group 310, Puzzle 3 (Basic Oxides).
Question is: Gas That Constitutes Almost 80% of Earth's Air
and the answer is: NITROGEN
Word Meaning:
NITROGEN — (uncountable) The chemical element with an atomic number of 7 and atomic weight of 14.0067. It is a colorless and odorless gas.
Definitions from Wiktionary.