The H of H-Bomb, First Tested in the US in 1952

This page is the CodyCross answer for the clue below from House of Horrors, Group 1109, Puzzle 5 (Castle Dungeon).

Question is: The H of H-Bomb, First Tested in the US in 1952

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.

The H Of H-bomb, First Tested In The US In 1952 - House of Horrors CodyCross Answers | CodyCross Solutions