how can splitting a tiny piece of an even tinier atom create such a vast explosion?

Question

how can splitting a tiny piece of an even tinier atom create such a vast explosion?

In: Physics

Answer 1

because even tinier little bits got turned completely into energy. Kind of like how a little bit of your eraser rips off, but instead of balling up it’s blasting through solid surfaces.

But there are no tiny pieces of atoms that are paradoxically bigger than the atom itself.