JokesMarriage Little Johnny’s Clever Interpretation Of Chemistry Class! Johnny’s unique take on the elements. 1.9k Views Teacher asks, “Who can tell me the chemical formula for water?” Little Johnny pipes up, “HIJKLMNO”! The teacher is puzzled, “What on Earth are you talking about, Johnny?” Little Johnny looks hurt, “But sir, you yourself said yesterday that it’s H to O!” See more Previous joke A Man Rushes His Limp Dog To The Veterinarian. Next joke A Husband Sends His Wife Bunch Of Presents.