Chemistry Crossword

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Across
  1. 1. electrons numbers of electrons in the outermost shell.
  2. 3. elements react and have properties that are similar.
  3. 4. The basic unit of matter, makes up everything.
  4. 7. used to separate liquid mixtures
  5. 9. change does not form a new substance.
  6. 12. Do not add mass to the atom, has a negative charge.
  7. 14. All of the elements to the left of the staircase.
  8. 16. used to separate a liquid to solid mixture.
  9. 17. An electrically charged element formed from the movement of electrons.
  10. 18. a positively charged particle.
  11. 20. composed of two or more compounds physically combined.
Down
  1. 2. A substance made of two or more elements, chemically combined.
  2. 5. touching the staircase line, properties of both metals and non-metals.
  3. 6. everything to the right of the staircase line.
  4. 8. Pure substances that can not be broken down by chemical means.
  5. 10. change when a chemical is changed into a new substance chemically.
  6. 11. Add mass to the atom, have no charge.
  7. 13. used to separate a solid to solid mixture.
  8. 15. number Tells you the number of protons.
  9. 19. rule Atoms will always react until they have a full shell.