Joke #604

Joke: Two chemists walk into a bar and the first one says, "I'll have some H₂O."

The second says, "I'll have some water too. Why'd you say 'H₂O'? We aren't at work."

The first chemist excuses himself and weeps in the bathroom.
His assassination plot had failed.

Joke: Why can't you ask a chemist to make you a Pb and J sandwich?

Joke: What did the proton say to the other proton?

Joke: What do you call a secret agent compound?

Joke: What's Batman's favorite element?

Joke: Knock knock!
Who's there?
Aldehyde!
Aldehyde who?
...
Must have been a leaving group.