20 words

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Across
  1. 5. can visually help us to understand objects motion
  2. 8. is the amount of space occupied by an object
  3. 9. An element’s location on the periodic table
  4. 10. is the amount of matter in an object
  5. 12. is the interval between two events
  6. 15. the distance an object travels per unit of time
  7. 16. Metals are good conductors of
  8. 17. All elements in the same period have the same number of energy levels
  9. 19. can remain constant and the velocity change if the object is changing direction
  10. 20. the most reactive metals
Down
  1. 1. The horizontal rows of the periodic table
  2. 2. The speed of an object and the direction of its motion
  3. 3. Metalloids have chemical properties like
  4. 4. The vertical columns of the periodic table
  5. 6. speed is the total distance traveled divided by the total time traveled
  6. 7. the nonreactive element
  7. 11. are the systems used by scientists around the world to make measurements
  8. 13. A table organizing all of the elements known to exist by atomic number and chemical properties is called
  9. 14. is an exact quantity that people use for comparison
  10. 18. Metalloids have physical properties like