I don’t pay attention to science
Because it takes time for the pressure to build enough to push the lava out.
I'm pretty sure it's they have the same properties, because they don't have different masses, they don't both have missing nuclei, and they don't hav a different # of protons. Can't recall much else about the two, but I distinctly remember that
The theoretical yield of a product is the calculated amount of what you are supposed to get by the end of a reaction assuming that nothing is lost, but the actual yield of the product is what you actually get when you carry out the reaction in real life conditions.