Chemistry

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Across
  1. 1. Pure substance with only one type of atom
  2. 5. Two or more atoms bonded together
  3. 7. Basic unit of matter
  4. 8. Substance made of two or more different elements
Down
  1. 2. Negatively charged particle in an atom
  2. 3. Substance with a pH greater than 7
  3. 4. Table Chart of all known elements
  4. 6. Neutral particle found in the nucleus
  5. 7. Substance with a pH less than 7
  6. 9. Positively charged particle in the nucleus