Scientific crossword

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Across
  1. 1. the study of particles and chemicals
  2. 3. a chart of elements
  3. 4. a mixture of 2 or more elements
  4. 5. harmful to life
  5. 8. a negative charged ion
  6. 9. a substance made of only one type of atom
  7. 11. a positive charged ion
  8. 13. a neutral charged particle in an atom
  9. 14. what elemants are made of
Down
  1. 1. the process of transformation from one substance too another
  2. 2. what the electrons float around in
  3. 6. an atom with full electron shells
  4. 7. a negative charged particle that floats around an atom
  5. 10. more than 1 thing combined
  6. 12. a positive charged particle in an atom