Across
- 2. pure substances ordered on the periodic table
- 5. qualities of an element
- 9. tiny building blocks of matter
- 11. particles with a positive charge
- 12. particles with no charge
- 13. number/ same as number of protons in the element
Down
- 1. created the first periodic table
- 3. gases/ group of un-reactive elements
- 4. these hold electrons
- 5. vertical columns
- 6. negatively charged particles
- 7. Metals/ elements that separate metals and non- metals
- 8. horizontal columns
- 10. table/ where elements are sorted