Importance of the atomic theory

The atomic theory is known for being the theory that referenced atoms as being the smallest pieces of matter in existence. This theory helped identify particles and how they operate which later was known as the particle model of matter.

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.