Periodic Table

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Across
  1. 2. a particle with a positive charge
  2. 5. the building blocks of life
  3. 6. the law of conservation of mass states matter cannot be...
  4. 8. the vertical (up and down) sections on the periodic table
  5. 9. a particle with a negative charge
  6. 10. equal to the number of protons and neutrons
  7. 12. the basic units of elements and matter
Down
  1. 1. the number in front of a chemical formula
  2. 2. arranges elements into groups and periods
  3. 3. the horizontal (left to right) sections on the periodic table
  4. 4. particles with no charge
  5. 5. the amount of matter in something
  6. 7. represented on the periodic table by symbols
  7. 8. number 79 on the periodic table
  8. 11. the material made from the chemical equation NaCl