Across
- 1. Made of only one type of atom
- 4. Thought about Atomic theory
- 7. Made the first model of the atom
- 9. Positively charged particle in an atom
- 10. Made of two or more atoms bonded together
- 11. Dense middle portion of an atom that is positively charged
Down
- 1. Negatively charged particle in an atom
- 2. Discovered the electron
- 3. Discovered the nucleus
- 5. Made the current atomic model
- 6. Came up with the planetary model of the atom
- 8. Building block of matter
- 9. pudding Model that Thomson made