
He taught your son
CHEMISTRY in high school.
Breaking Bad Season 2, Episode 2

he asked that I use
my CHEMISTRY knowledge
Breaking Bad Season 5, Episode 11

I was terrible at CHEMISTRY.
Breaking Bad Season 2, Episode 8

Oh, my God. You really are
a CHEMISTRY teacher.
Breaking Bad Season 2, Episode 8

But...what about the CHEMISTRY?
Breaking Bad Season 4, Episode 8