Chemistry - You don't

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Across
  1. 4. Group 17 on the Periodic Table and are all non-metals
  2. 5. This process that leads to the transformation of one set of chemical substances to another
  3. 8. This dioxide id naturally occurring oxide of titanium, chemical formula TiO2
  4. 12. A state of matter in which cohesive force is less than or equal to the separating force
  5. 13. The measure of acidity (or basicity) of a solution
  6. 15. A device used to measure the pressure in the atmosphere
  7. 16. Latin name of the halogen element iodine
  8. 17. An alloy of iron and other elements
  9. 18. The branch of chemistry concerned with the chemical effects of light
  10. 21. The phase change from a solid to a liquid
Down
  1. 1. This is a subatomic particle
  2. 2. It is a substance or compound added to a system to cause a chemical reaction
  3. 3. A unit to measure pressure
  4. 6. International Union of Pure and Applied Chemistry
  5. 7. An organic compound with the formula (CH2)2(CH)4
  6. 9. The property of some chemical elements to exist in two or more different forms
  7. 10. An inorganic chemical with the chemical formula P2
  8. 11. The increase in the rate of a chemical reaction due to the participation of an additional substance called ...
  9. 13. A chemical element with atomic number 15
  10. 14. A polyhedron composed of four triangular faces, six straight edges, and four vertex corners
  11. 19. The part of the solution that dissolves the solute (H2O in saline water)
  12. 20. It is a chemical element with atomic number 8