Element Number 1 in the Periodic Table
This page is the CodyCross answer for the clue below from Brazilian Tour, Group 779, Puzzle 3 (Fernando De Noronha).
Question is: Element Number 1 in the Periodic Table
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.