History of Atom Project

3. Created the theory that electrons moved in a followed path and not in a random motion.
4. Developed the "atomos" theory
8. He first began investigating the structure of an atom and then later on invented the "Plum Pudding" Model.
9. A model that showed how cathode rays interacted with matter and discovered "negatively charged" particles called electrons.
10. A theory of Quantum Mechanics has developed, it is now believed that electrons exist in an area not in a specific path.
11. Was more developed than Democritus and believed that all matter consisted of 4 elements: Earth Fire, Wind, and Water.
12. Was suggested that electrons don't move in a random motion and they actually follow a path around the nucleus.
13. A compound, no matter what its source, always contains definite, or constant proportions of its element by mass.
14. Was an English schoolteacher who developed a theory involving the relationship between an atom and matter.
15. A model that was imagined for the electrons moving around like nucleus like planets revolving around the sun.

1. Created the gold foil experiment.
2. States that when elements combine, they do so in the ratio of small whole numbers.
5. A theory that believed that all matter consisted of 4 elements: Wind, Fire, Water, and Earth.
6. A theory that states that matter is made of tiny particles called atoms that can't be subdivided.
7. A theory when believed all matter was divisible to a point where no more division was possible.