Science assignment

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Across
  1. 4. acted upon a ............ to change the directon
  2. 5. f=ma
  3. 6. dxt
  4. 11. the top of the triangle
  5. 13. an extremely small, positively charged nucleus surrounded by a cloud of negatively charged electrons
  6. 15. atoms sufficient,coefficients,chemical formals
  7. 18. what are the elements on the staircase of the periodic tablel
  8. 19. negatively charged subatomic partical
  9. 20. speed traveled in a certain direction
Down
  1. 1. object in motion stays in motion object at rest stays at rest unless acted upon an unbalanced force
  2. 2. every action has a equal and opposite reaction
  3. 3. how do you determine what group an element is in
  4. 7. positively charged subatomic partical
  5. 8. the element is in group 5 period 4 whats the element
  6. 9. groups/periods/energy levels/metals/nonmetals/metalloids
  7. 10. what element is the letter h in the periodic table
  8. 12. neutrally charged subatomic partical
  9. 14. you can see it change, its a chemical reaction
  10. 16. f/m
  11. 17. f/a