Chemistry - Periodic Table

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Across
  1. 4. negative
  2. 5. C or Ne or He
  3. 6. neutral
  4. 8. positive
Down
  1. 1. number of grams in each cubic centimeter
  2. 2. science
  3. 3. make everything up
  4. 4. periodic table
  5. 7. net of electric charge