chemistry crossword

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