Are atoms on earth the same across the universe?

Question

Do the dynamics of atoms and their properties hold true across the universe?

In: Chemistry

Answer 1

There is a principle in science called the [cosmological principle](https://en.wikipedia.org/wiki/Cosmological_principle) which basically (ELI5 version) says the universe is the same everywhere when viewed on large scales. Matter distribution, matter composition and so on.

Of course, we have not been everywhere in the universe but I doubt there are many scientists who would disagree with that. The periodic table which describes the elements would be the same everywhere in this universe.