Science T2 Recap

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Across
  1. 4. Reaction where two or more substances combine to form one product
  2. 6. Reaction where one compound breaks down into simpler substances
  3. 8. A chemical reaction that produces heat and light
  4. 9. Arrangement of electrons in an atom
  5. 10. Gas essential for combustion to occur
Down
  1. 1. A process in which substances change into new substances
  2. 2. Negatively charged particle in an atom
  3. 3. A pure substance made of only one kind of atom
  4. 5. Substance formed as a result of a chemical reaction
  5. 7. The loss of electrons in a chemical reaction