| A | B |
|---|
 | electrons occur in layers around nucleus |
 | discovered the neutron |
 | developed the atomic theory |
 | credited with the term "atom" |
 | E=mc2 |
 | first to determine that atoms are made of parts |
 | came up with the Saturn model of the atom |
 | first to determine that atoms are mostly empty space |
| wave theory | based on the idea that electrons move real fast and jump energy levels |
