Chemical Element With the Atomic Number 1

This page is the CodyCross answer for the clue below from London, Group 489, Puzzle 1 (Millennium Bridge).

Question is: Chemical Element With the Atomic Number 1

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.

Chemical Element With The Atomic Number 1 - London CodyCross Answers | CodyCross Solutions