chemical reaction crossword puzzle

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Across
  1. 2. - Any chemical element that is an effective conductor of electricity and heat can be defined as
  2. 7. - also applied to describe a solution or mixture in which water is the solvent
  3. 8. equation - hydrogen + oxygen
  4. 11. - its volume is not fixed; it will expand to fill a container
  5. 14. - a substance whose atoms all have the same number of protons
  6. 15. - occurs between a fuel and an oxidizing agent that produces energy, usually in the form of heat and light
  7. 17. reaction -a process that involves rearrangement of the molecular or ionic structure of a substance
  8. 18. - on the right-hand side
  9. 20. - additional substance
Down
  1. 1. - substance formed when two or more chemical elements are chemically bonded together
  2. 3. of conservation of atoms - total mass of all the substances taking part in the reaction remains the same
  3. 4. -definite volume, it does not have a definite shape
  4. 5. ion - an ion composed of two or more atoms
  5. 6. - chemical element that mostly lacks the characteristics of a metal
  6. 9. - transfer of valence electron(s) between atoms
  7. 10. - atoms or molecules are tightly connected
  8. 12. - given on the left-hand side
  9. 13. - # after the element
  10. 16. -single compound breaks down into simpler compounds
  11. 19. equation - reactant given on the left-hand side and the product on the right-hand side