Why do they Obey?

I was reading a printed book about the elements the other day, the book is about the atoms that compose all matter, hydrogen, helium, lithium. Things like that. 

I was wondering why all atoms obey the rules. All atoms have a first shell that can hold 2 electrons. Bigger attoms have additional shells that can hold 8 electrons each. The first shell in an atom always holds 2 electrons, the second shell always hold up to 8 electrons. Why do all particles obey the same laws? There are so many of them and the universe is so big yet every last atom follows all the rules, they never disobey as far as I know. It is confusing to think that a universe that is so big is so orderly, as if it was just information.