Chemical Element With an Isotope Called Deuterium
This page is the CodyCross answer for the clue below from The 70's, Group 332, Puzzle 1 (Isle of Wight).
Question is: Chemical Element With an Isotope Called Deuterium
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.