Science Crossword

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Across
  1. 5. What does 'aq' stand for?
  2. 6. Rusting is a ___ change.
  3. 8. Have negative charges.
  4. 11. What do you call the larger structures formed by atoms?
  5. 13. K is the symbol for ___.
  6. 14. 84 elements are ___.
  7. 17. The ___ ___ is the number of protons in the nucleus.
  8. 18. Substance made of 2 or more elements that are NOT bonded.
  9. 20. Reaction rate can be affected by the ____ of reactants.
  10. 24. space Atoms are mainly ___ ___.
  11. 26. Number of protons and neutrons is called the ___ ___.
  12. 28. Substance made of 2 or more elements that are bonded.
  13. 29. Ice cream melting is a ___ change.
Down
  1. 1. 2nd element in the halogens column.
  2. 2. Where neutrons and protons are found.
  3. 3. Electrons orbit the nucleus in ___.
  4. 4. Have positive charges.
  5. 6. ___ help speed up the reaction.
  6. 7. What is the solid called when 2 solutions are mixed together?
  7. 9. Elements are made of ___.
  8. 10. Who discovered neutrons?
  9. 12. Has 6 neutrons.
  10. 15. Surname of a physicist who experimented with radio-active particles.
  11. 16. What type of reaction is it when something burns or explodes?
  12. 19. Hydrogen and oxygen gas explode together to form ___ ___.
  13. 21. Have neutral charges.
  14. 22. These are fast-moving neutral particles that fill atoms.
  15. 23. Elements are shortened down to one or two letters which is called the ___.
  16. 25. Special type of catalysts are called ___.
  17. 27. Cu is ___.