Physical Science

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