Chemistry Crossword

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Across
  1. 2. A charged particle.
  2. 3. Substance with a pH below 7.
  3. 4. Substance with a pH above 7.
  4. 6. A substance made of two elements chemically combined.
  5. 7. A substance that increases the speed of a chemical reaction.
  6. 8. A combination of atoms bonded together.
Down
  1. 1. Chart that organizes elements by atomic number.
  2. 3. The smallest unit of matter.
  3. 5. A chemical change that forms new substances.