It's funny because he is stupid

Matt must be fun at parties

A guy in my ADVANCED chemistry class was shocked when he found out water is a chemical when my teacher had literally said 2 minutes before that everything has chemicals.

And I tell lots of chemistry jokes, but most of them don't get a big REACTION anymore!

See, I was going to tell a Sodium joke, but I figured Na

It's funny cuz you pointed out the part which was supposed to make the joke funny