Hydrogen.
The Big Bang Theory Season 12, Episode 23
HYDROGEN was a little more
common or a little less common.
The Big Bang Theory Season 7, Episode 5
Atom of HYDROGEN,
Adam of Maroon 5, mic drop.
The Big Bang Theory Season 9, Episode 23
- What are you doing in there?
- I'm making HYDROGEN sulfide...
The Big Bang Theory Season 4, Episode 4
A HYDROGEN atom, H,
plus pigs minus P, "higs."
The Big Bang Theory Season 3, Episode 13