First Element of Periodic Table
This page is the CodyCross answer for the clue below from Under the sea, Group 22, Puzzle 1.
Question is: First Element of 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.