Why atoms are so small

Atoms are small, really small -- there are some thirty thousand billion of them in the head of a pin. But why are atoms so small? It took a great physicist, Erwin Schrödinger, to even think to ask such a question, as he did some 70 years ago in his classic text "What is life?" Already then he took a first step toward its resolution by pointing out that the real issue is not the small size of atoms, but rather the big size of us living creatures. Atoms are small in comparison to us. So the true question becomes: Why are so many atoms -- zillions of them -- needed to make up even the very simplest living thing? Why are we so complex?Well, thanks to a new area of study, systems chemistry, we now have the answer. Living things are highly complex chemical systems, with one central characteristic -- they are fundamentally replicative. All living things are structurally dedicated to that primal agenda, to make more of themselves (though that doesn't mean that all living things are able replicate). But, of course, living things did not appear all of a sudden. The process took millions of years and is generally believed to have begun with the fortuitous emergence of some simple molecular system endowed with the unusual capacity of self-replication. And that primal system then began to evolve

Atoms are small because they are made up of very small sub atomic particles protons neutrons and electrons .i think it can be the logic of this question ?.