Across
- 2. cloud cloud like group of electrons
- 3. A substance made up of atoms or two more different elements
- 4. Negative Charge
- 5. Table Table of Elements
- 7. Neutral Charge
- 9. smallest particle
Down
- 1. Positive charge
- 3. the branch of science that deal with the study composition, structure, and properties of matter and the changes which matter undergoes
- 6. A certain type of atom
- 8. the center of the