Across
- 3. All matter is made of tiny particles called
- 4. Proposed that matter is made of tiny, indivisible particles called “atomos”
- 6. Helps determine isotopes
- 8. Discovered the electron using cathode ray experiments
- 9. Discovered the Atom has a small, dense, positively charged nucleus
- 10. change results in the formation of a new substance with different properties.
Down
- 1. Proposed that electrons move in fixed energy levels (shells)
- 2. affects the form or state of a substance, but not its identity.
- 5. Determines the atomic number and identity of the element
- 7. Responsible for chemical bonding