Across
- 4. For every action there is an equal and opposite reaction
- 7. speed plus direction
- 8. a particle with a nuetral
- 9. distance/time
- 13. When something is made of 1 atom
- 15. a particle with with a negative charge
- 18. the amount of electrons in the third energy level
- 20. they go across on the periodic table
Down
- 1. when plates crash into each other
- 2. F=MA
- 3. law of inertia
- 5. the amount of electrons in the first energy level
- 6. when plates move away fro each other
- 10. they determine the reactivity an element
- 11. they go up and down on the periodic table
- 12. change in speed or direction or both
- 14. a particle with a positive charge
- 16. the side of the periodic table that is very stable
- 17. the side of the periodic table that is very reactive
- 19. Smallest part of an element
- 21. the amount of electrons in the second energy level