matter and energy

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Across
  1. 3. number of protons in an atom
  2. 5. positive parts of an atom
  3. 6. 107 is the weight of the element
  4. 10. neutral or no change
  5. 11. same valence electrons
  6. 13. they are usually gases but include dull, and brittle solids
  7. 14. the reaction needing valence shells
  8. 15. changes chemical properties from left to right
  9. 16. the building block of everything
  10. 17. deals with atoms and the big bang
Down
  1. 1. anything that is touchable
  2. 2. the number of electrons on the farthest part of the electron cloud
  3. 4. really shiny, has the best conductivity, and the greatest malleability
  4. 7. negative part of an atom
  5. 8. Kr is the symbol of the element
  6. 9. they deal with things like chemicals and discover new things
  7. 12. are not shiny, have a semi-conductive property, and are brittle
  8. 15. a table with all elements
  9. 16. number of protons and neutrons in the nucleus