Chemistry Crossword Puzzle

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Across
  1. 1. are groups that run up and down
  2. 6. a particle with a negative charge found in all cells surrounding the protons and neutrons.
  3. 11. a particle of matter that defines a chemical element
  4. 12. happening/acting suddenly.
  5. 13. a particular kind of matter
  6. 14. elements on the right side of the periodic table
  7. 15. a table of the chemical elements arranged in order of atomic number
  8. 17. elements on the left side of the periodic table
  9. 18. a change in matter that doesn't change the chemical.
  10. 19. chemical/reaction on the periodic table
Down
  1. 2. energy can neither be created nor destroyed.
  2. 3. the brain/main part of a cell.
  3. 4. characteristics that show us the difference of materials
  4. 5. a change of chemical into another/one or more substance is formed.
  5. 7. a representation of a chemical reaction using symbols of the elements
  6. 8. the structure and properties of ______
  7. 9. the electrons located at the outermost shell of an atom
  8. 10. a substance that undergoes change during a reaction.
  9. 16. periods that go left to right