chemistry crossword

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Across
  1. 1. Good conductors of heat and electricity.
  2. 7. it is a shorthand method of representing an element.
  3. 11. a substance made by mixing other substances together.
  4. 12. The temperature when a liquid starts to vaporize.
  5. 13. when a solid formed from a solution.
  6. 15. a stable particle with a negative electricity it found in all atoms and acting as the main carrier of electricity in solids.
  7. 16. a stable particle occurring in all atoms it has positive charge.
  8. 17. able to dissolve other substances.
  9. 20. a group of atoms bonded together.
Down
  1. 2. the number of protons in the nucleus of an atom.
  2. 3. exploding
  3. 4. A table filled with elements in order of atomic numbers.
  4. 5. The temperature when a soled starts to liquidize.
  5. 6. the around a nucleus where electrons are found.
  6. 8. a particle about the same mass as a proton but with no charge.
  7. 9. a method of writing the chemical symbol of an element and surrounding it with dots to show the number of valence electrons.
  8. 10. The center of a atom.
  9. 14. The vertical columns on the periodic table.
  10. 18. the amount of compactness in somthing.
  11. 19. Horizontal rows of elements.