![A hydrogen atom, H,
plus pigs minus P, A hydrogen atom, H,
plus pigs minus P,](https://content2.mcqstudy.com/ss/tbbt-3-13-00:08:39.879.jpeg)
A HYDROGEN atom, H,
plus pigs minus P, "higs."
The Big Bang Theory Season 3, Episode 13
![- What are you doing in there?
- I'm making hydrogen sulfide...
- What are you doing in there?
- I'm making hydrogen sulfide...](https://content2.mcqstudy.com/ss/tbbt-4-4-00:18:21.835.jpeg)
- What are you doing in there?
- I'm making HYDROGEN sulfide...
The Big Bang Theory Season 4, Episode 4
![hydrogen was a little more
common or a little less common.
hydrogen was a little more
common or a little less common.](https://content2.mcqstudy.com/ss/tbbt-7-5-00:08:53.792.jpeg)
HYDROGEN was a little more
common or a little less common.
The Big Bang Theory Season 7, Episode 5
![Hydrogen.
Hydrogen.](https://content2.mcqstudy.com/ss/tbbt-12-23-00:19:32.258.jpeg)
Hydrogen.
The Big Bang Theory Season 12, Episode 23
![Didn't you say you're making
hydrogen sulfide gas?
Didn't you say you're making
hydrogen sulfide gas?](https://content2.mcqstudy.com/ss/tbbt-4-4-00:18:47.860.jpeg)
Didn't you say you're making
HYDROGEN sulfide gas?
The Big Bang Theory Season 4, Episode 4