Atomic Theory

2. an uncharged subatomic particle with a mass the same as protons
4. found evidence of nuetrons
8. The volume of an atom is mostly empty _____.
9. did a cathode ray tube experiment
11. Milikan discovered the _____ of an electron.
13. a positive charged subatomic particle
15. His atomic theory had 4 postulates
16. the first person to suggest the existence of atoms and called them atomos.

1. Thomson discovered this.
3. Rutherford said there is a small heavy positively charged body in the center of each atom called a...
5. Dalton believed atoms of a given element were _____ in size, mass, and properties.
6. atoms of the same element that differ in mass.
7. atoms of different elements _____ in size, mass, and other properties.
10. the charge of an electron
12. all matter is composed of extremely small particles called atoms
14. did a gold foil experiment.