periodic table puzzle :)))

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Across
  1. 2. partials in the nucleus that have no charge
  2. 5. term for the rows of the periodic table
  3. 6. ease and speed at which one element combines with one another
  4. 9. deterioration of a metal due to chemical reaction
  5. 11. average mass of all the isotopes of that element
  6. 12. means salt forming. Florine,bromine, chlorine,iodine,are very reactive.
  7. 15. arrangement of all the elements showing a repeating pattern
  8. 16. can be pulled out or drawed into long wires
  9. 18. can be hammer or rolled into flat sheets or shapes
  10. 20. elements that are good conductors of electricity and heat, often shiny and bendable
  11. 21. positively charged particle in the nucleus of an atom
  12. 22. element that lacks most properties of a metal. mostly found on the right side.
Down
  1. 1. one or two letter abbreviation for an element
  2. 3. have some properties of metals and nonmetals.
  3. 4. two molecules of the nitrogen family are combined with each other and are not very reactive
  4. 7. most reactive elements
  5. 8. number of protons in the nucleus of an atom
  6. 10. very center of an atom
  7. 13. term for the columns of the periodic table (families)
  8. 14. elements of group 18
  9. 17. negatively charged particle that orbits the center of an atom
  10. 19. shiny and reflective