Joke #302

Joke: Teacher: What is the formula for water?

Johnny: H I J K L M N O.

Teacher: No Johnny, it's H₂O.

Johnny: That's what I said.

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.

Joke: Tell me the symbol for Nobelium!
No.
Why?
Yttrium.
Oh!
Oxygen!