Compounds and Chemical Reactions Feb 15

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Across
  1. 3. a combination of two or more atoms
  2. 5. a form of energy some reactions give off
  3. 6. a substance made of two or more elements that are chemically combined
  4. 7. a reaction where two simpler substances become one more complex substance
  5. 8. a molecule made of two atoms
  6. 11. a process where electrical energy breaks apart water
  7. 12. a reaction where a complex substance breaks down into two or more simpler ones
  8. 13. two words. The process where chemicals combine or break down to form new substances
  9. 14. some reactions form this Think bubbles
  10. 16. something that can change in some reactions
  11. 17. a reaction where two compounds swap elements
Down
  1. 1. the simplest particle that makes up an element
  2. 2. the solid that forms from two liquids in some reactions
  3. 4. a reaction where one element boots out an element in a compound
  4. 9. these hold the atoms in compounds together
  5. 10. these will change as a result of a chemical reaction
  6. 15. some of the pennies became this