Chemistry

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Across
  1. 3. __________ is when the object sinks
  2. 8. ____________ is when the object floats.
  3. 9. The _______ contains all the elements.
  4. 10. Inside the nucleus, it contains _______ and neutrons.
  5. 12. ___________ can be identified by PUFLART
  6. 16. When two elements make an explosion it is called _____________?
  7. 17. On the periodic table it contains ______?
  8. 18. This whole unit is called ______.
  9. 20. The "F" in PUFLART.
  10. 21. The "U" in PUFLART,
Down
  1. 1. This is the first element on the periodic table.
  2. 2. Inside the nucleus, it contains protons, and _______.
  3. 4. The "L" in PUFLART.
  4. 5. The "R" in PUFLART.
  5. 6. The "P" in PUFLART.
  6. 7. The "T" in PUFLART.
  7. 11. On the the leftt side beside the elements is called the _______.
  8. 13. _______ gives off negative energy.
  9. 14. When an object changes size, matter, or shape it is called?
  10. 15. The "A" in PUFLART.
  11. 19. On the periodic table the numbers on the top of the element is called?