Across
- 2. has a pH less than 7
- 3. any object that attracts objects containing iron
- 4. has pH more than 7
- 6. how much matter
- 8. horizontal rows of the periodic table
- 10. tiniest particle
- 11. has neutral or no charge in an atom
- 14. releasing heat
- 15. atom with more neutrons than electrons
- 18. columns on the periodic table
Down
- 1. charged particle
- 2. the building blocks of matter
- 3. solid changing to a liquid
- 5. a pattern or plan
- 7. Positively charged particle in an atom
- 9. Test or investigation
- 12. Center of an atom
- 13. speed in a given direction
- 16. the ability to do work
- 17. rate at which an object moves