“Why did the physics teacher break up with the biology teacher?”/“There was no chemistry.”

A school science joke is:
   
Q: Why did the physics teacher break up with the biology teacher?
A: There was no chemistry.
 
The joke was posted on Twitter on September 3, 2010 and has been printed on several images.
 
   
Twitter
Phil Hatfield
‏@hattiepeverel
The physics teacher and the biology teacher broke up ... there was just no chemistry (I thank you!)
4:38 AM - 3 Sep 2010
 
Twitter
Lindsay Driscoll
‏@saydriscoll
RT: @AccioAlyssa: A biology teacher and a physicist got together but there was no chemistry.
8:37 PM - 25 Oct 2011
 
Twitter
Spencer Plantinga
‏@Splantingatree
a physics teacher and a biology teacher went out on a date, but there was no chemistry.
11:04 PM - 28 Nov 2011
 
Twitter
Shan
‏@shannnn_
@JayTheWanted a Biology Teacher and a Physics Teacher got married but soon had to divorce because there was no…Chemistry. #sciencejoke 😉
4:24 PM - 7 Dec 2011
 
Google Books
Average Joe to Speaking Pro
By Bill Haubrich and Chris Peters
Lulu Publishing (Lulu.com)
2012
Pg. 103:
A Physics teacher teamed up with a Biology teacher for a project, but it didn’t work out well. There was no chemistry between them.
 
The Amazingly Lame Joke of the Day
Friday, April 8, 2016
Why did the physics teacher break up with the biology teacher?
There was no chemistry.
Posted by Tim Wycislak at 5:45 AM
     
Reddit
Why did the physics teacher break up with the biology teacher?
submitted August 13, 2016 by ramansidhu
BECAUSE There was no chemistry. LOL
 
Reddit
The physics teacher break up with the biology teacher
submitted October 2, 2016 by jjpresta
Why did the physics teacher break up with the biology teacher? There was no chemistry.