Atomic theory states that atoms have 3 main parts: protons and neutrons are contained at the center in the nucleus, electrons orbit around the outside of the nucleus in shells, and most of the atom is empty space with electrons orbiting far from the nucleus.

1. Atomic Theory The structure of the atom

2. 3 parts of an Atom

3. Structure of an Atom Protons and Neutrons are contained in the nucleus Electrons orbit around the nucleus in orbital shells Most of the atom is empty space