chem puzzle

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Across
  1. 4. a reaction in which two reactants combine to form one product.
  2. 5. the symbolic representation of a chemical reaction in the form of symbols and formula
  3. 6. high-temperature exothermic redox chemical reaction between a fuel and an oxidant, usually atmospheric oxygen, that produces oxidized, often gaseous products, in a mixture termed as smoke.
  4. 7. the species formed from chemical reactions
  5. 8. a substance or compound added to a system to cause a chemical reaction
  6. 9. a chemical reaction in which one element is replaced by another in a compound
Down
  1. 1. a chemical process involving the exchange of bonds between two reacting chemical species which results in the creation of products with similar or identical bonding affiliations.
  2. 2. the process or effect of simplifying a single chemical entity into two or more fragments.
  3. 3. a list of elements in decreasing order of their reactivity.