Periodically. Ha! Get it?

Funny pictures about Told a chemistry joke in class today. Oh, and cool pics about Told a chemistry joke in class today. Also, Told a chemistry joke in class today.

Grumpy Chemistry Cat. You want to hear a joe about Nitric Oxide? NO. I <3 this cat so much.

You want to hear a joe about Nitric Oxide? I this cat so much. My Organic Chemistry teacher would laugh at this

"Nerdy (Periodically Speaking)" T-Shirts & Hoodies by Samuel Sheats | Redbubble

‘Nerdy (Periodically Speaking)’ T-Shirt by Samuel Sheats

I may be N Er Dy, but only periodically. Nerdy (Periodically Speaking) T-Shirts & Hoodies by Samuel Sheats

I tell chemistry jokes...periodically.

14 Jokes Only Chemistry Geeks Will Understand

I tell chemistry jokes...periodically.

14 Jokes Only Chemistry Geeks Will Understand

I use this pillow periodically science pillow

I use this pillow periodically science pillow

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