Small Things

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Across
  1. 3. Chargeless subatomic particle
  2. 7. The dense center of an atom
  3. 8. The smallest particle of a compound
  4. 9. The smallest basic unit of life
  5. 10. Negative subatomic particle
Down
  1. 1. Positive subatomic particle
  2. 2. A group of similar cells that carry out a function
  3. 4. Groups of different tissues
  4. 5. Holds the DNA
  5. 6. An example of a macromolecule
  6. 7. The smallest particle of an element