Q: What did the chemist say when he found two isotopes of Helium?
A: HeHe.
Chemist's Helium Discovery
Categories
Explanation
Experiment
Explain Bear
Listen up, buttercup. You probably don't even know what Helium or an isotope is. Well, Helium is a chemical element, and isotopes are variants of it. "He" is the symbol for Helium on the periodic table. The joke is that "HeHe" sounds like a giggle or laugh.