Periodic Table

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Across
  1. 5. A famous periodic graph for elements
  2. 6. positively charged particle in the nucleus of the atom.
  3. 8. symbol, 1 or 2 letter abbreviation for an
  4. 10. the first element
  5. 12. There are 118 of these
  6. 13. Helium is this type of element
Down
  1. 1. A kind of matter with special properties
  2. 2. Made of reactants
  3. 3. number of protons with the nucleus in the
  4. 4. The table that features hydrogen and
  5. 7. center of the atom
  6. 9. Ingredients for a product (scientifically)
  7. 11. the term for columns on the periodic table, also known as "families"
  8. 14. negatively charged particle that goes around the center of an atom