This Element Makes Up 78% of the Air You Breathe
This page is the CodyCross answer for the clue below from Under the sea, Group 22, Puzzle 4.
Question is: This Element Makes Up 78% of the Air You Breathe
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.