Across
- 1. the amounts of ring in an electron cloud
- 4. a negative charge in an atom
- 6. the center of an atom
- 7. a positive charge in an atom
- 8. a neutral charge in an atom
- 9. the vertical columns in the periodic table
Down
- 2. electron that can be used in other atoms
- 3. multiple atoms together
- 5. a small particle that makes up every matter
- 7. the horizontal rows in the periodic table