chemistry

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Across
  1. 2. any substance that cannot be decomposed into simpler substances by ordinary chemical processes
  2. 3. a substance that takes part in and undergoes change during a reaction.
  3. 5. breaks down two or more elements
  4. 7. two or more elements combined to form a compound
  5. 8. a substance that is formed as the result of a chemical reaction.
  6. 10. a small-sized number on the bottom right of the symbol
  7. 13. ions present in 2 compounds in an aqueous solution change places to form 2 new compound
Down
  1. 1. a hydrocarbon reacts with oxygen to form carbon dioxide and water
  2. 4. the building block of chemistry
  3. 6. this is neither created nor destroyed
  4. 9. any substance composed of identical molecules consisting of atoms of two or more chemical elements
  5. 11. replacement is an element that switches places or replaces another element
  6. 12. mass is the mass in grams of 1 mole of the substance