Hydrogen is "water stuff"

“Hydrogen” in German is Wasserstoff, which sounds hilarious except it’s just a literal translation of the Greek hydro-gen!

Most chemical elements are more or less the same in German and English. The fun exceptions are:

German also has Natrium (Sodium), Kalium (Potassium), Wofram (Tungsten), Quecksilber (Mercury), and Blei (Lead).