Q: Why did the atoms cross the road?
A: It was time to split!
Explanation: Ah, yes, this one reminds me of my first joke on this site.
To split means to leave. If I were watching a soccer game, at the end I might say, “Game’s over. Let’s split.” And then we would leave the park or the stadium where the game was being played.
When you “split an atom” you release a lot of energy, like in a nuclear bomb.
This joke is funny because it plays with two meanings of split. Split also means to divide something into parts. If you are a gymnast you might know how to do the splits. You might even make a banana split.
Here is how atoms were first split: