chemistry crossword

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Across
  1. 4. matter with no defined volume and shape
  2. 6. number of protons in an atom
  3. 7. metal, used in computer chip
  4. 8. stranger's gas
  5. 10. an atom or molecule with net charge
  6. 12. ....energy is energy required to start the reaction.
  7. 13. type of material tat is considered as good conductor of heat and electricity
Down
  1. 1. a test in laboratory
  2. 2. gradual destruction of metal
  3. 3. atom bonded to four different species.
  4. 5. type of solid, irregular structure
  5. 9. chief component in biogas
  6. 11. type of bond, between atoms of electronegativity difference