
Not lima beans. Carbon atoms.
The Big Bang Theory Season 3, Episode 14

Diamonds, crystallized CARBON.
The Big Bang Theory Season 5, Episode 12

I don't know. How do CARBON atoms
form a benzene ring?
The Big Bang Theory Season 2, Episode 13

...while I build CARBON atoms.
The Big Bang Theory Season 3, Episode 14

Carbon.
The Big Bang Theory Season 12, Episode 23