Hydrogen.
The Big Bang Theory Season 12, Episode 23
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
they theoretically can separate
the HYDROGEN from the oxygen,
Breaking Bad Season 2, Episode 12