CHEMISTRY CROSSWORD

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Across
  1. 2. The number of protons and neutrons in the nucleus of an atom
  2. 3. Short form of an Element
  3. 7. The number of protons in the nucleus of an atom
  4. 10. The smallest particle of an element
  5. 11. The outermost shell of an atom
  6. 15. Solid State formed from the gaseous state on cooling
Down
  1. 1. The new substances formed as a result of a chemical reaction
  2. 4. The term used for a particular kind of matter
  3. 5. The positively charged ions
  4. 6. Combining capacity of an elemeny
  5. 8. Anything which occupies space and has mass
  6. 9. The substances which take part in a chemical reaction
  7. 12. The negatively charged ions
  8. 13. The gaseous form of a solid
  9. 14. A pure substance which cannot be broken into two or more substances by any known physical and chemical mean