Meme Day 17: Chemistry Cat

Chemistry Cat is comprised of an image of a cat in a lab and a whitty joke based on some form of chemistry.  Most are either a play on words or use the Periodic Table of the Elements, the elemental names, and elemental symbols to make the joke.  It's a meme that us nerds appreciate :)  I'll try to explain these...

Light is made up of photons that travel through space

More past the break!

Sodium's element symbol is Na

A neutron is part of an atom that doesn't have a positive or negative charge

Boron = B, Osmium = Os, Sulfur = S

Nitrous Oxide = NO

Bromine = Br, Boron = B

Chemical reactions...

Potassium = K

I know, I know, call me a nerd - I get these jokes.  I'll appreciate it :)