Lewis dot structures are models used to show what type of subatomic particle of an
atom?

Lewis dot structures are models used to show the arrangement of valence electron in an atom.

Aphysical change is one that you can put in and remove like a ham sandwich. the stuff you put in there can be changem its not permanet. a chemical change is on that can't be change thats permanet. like when you make a cake and bake it. you can't get those ingredients back.