One of the Elements Found in Water, Not Oxygen

This page is the CodyCross answer for the clue below from New York, New York!, Group 369, Puzzle 4 (Bryant Park).

Question is: One of the Elements Found in Water, Not Oxygen

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.

One of the elements found in water, not oxygen — CodyCross Answer | CodyCross Solutions