Two Atoms of This Plus an Oxygen Atom Makes Water

This page is the CodyCross answer for the clue below from Prehistory, Group 1244, Puzzle 3 (Spears and Arrows).

Question is: Two Atoms of This Plus an Oxygen Atom Makes Water

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.

Two Atoms Of This Plus An Oxygen Atom Makes Water - Prehistory CodyCross Answers | CodyCross Solutions