Periodic Table

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Across
  1. 2. The rows on the periodic table
  2. 3. The person who believed matter was made of the 4 elements
  3. 5. A neutrally charged sub-atomic particle
  4. 8. A column on the periodic table
  5. 9. A pure substance
  6. 10. protons plus neutrons
Down
  1. 1. A sub atomic particle with an extremely small mass
  2. 4. The middle section of an atom
  3. 6. The eighth element
  4. 7. What we use to represent an element on the periodic table