Chemistry Review

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Across
  1. 2. A group of atoms bonded together
  2. 4. Reaction with oxygen that releases heat and light
  3. 7. Substance formed in a chemical reaction
  4. 11. Starting substance in a chemical reaction
  5. 12. Electrons in the outermost shell
  6. 15. Type of bonding with a ‘sea of electrons’
  7. 16. Scale used to measure acidity or alkalinity
  8. 17. A reaction that releases heat
  9. 19. base Reaction where an acid reacts with a base to form salt and water
  10. 20. A substance that can dissolve in a solvent
  11. 21. Process that uses electricity to split compounds
Down
  1. 1. Reaction where a compound breaks down into simpler substances
  2. 3. Substance that speeds up a reaction without being used up
  3. 5. where two or more substances combine to form one product
  4. 6. A charged particle
  5. 8. An insoluble solid formed in a reaction
  6. 9. Substance that reacts with acids to form salt and water
  7. 10. The smallest unit of matter
  8. 13. Mixture of metals or metals with other elements
  9. 14. Table that arranges elements by atomic number
  10. 18. Reaction between acid and base