periodic table crossword puzzle

1234567891011121314151617181920
Across
  1. 1. any of five related nonmetallic elements (fluorine or chlorine or bromine or iodine or astatine) that are all monovalent and readily form negative ions.
  2. 4. an elementary particle with negative charge.
  3. 7. a stable particle with positive charge.
  4. 8. a mixture containing two or more metallic elements.
  5. 9. a chemical element or alloy that is usually a shiny solid.
  6. 15. a subatomic particle with zero charge.
  7. 17. atom with same atomic number, different number of neutrons.
  8. 18. capable of being shaped or bent or drawn out.
  9. 19. capable of being shaped or bent.
  10. 20. ready susceptibility to chemical change.
Down
  1. 2. shiny and reflective.
  2. 3. term for the columns of a periodic table. (also called families).
  3. 5. the smallest component of an element.
  4. 6. not resembling shiny, malleable, conductive elements.
  5. 10. deterioration in metals from oxidation or chemical action.
  6. 11. term for the rows of a periodic table.
  7. 12. number, number of protons in an atom's nucleus, the positively charged dense center of an atom.
  8. 13. gasses, elements of group 18.
  9. 14. symbol, one or two letter abbreviation for an element.
  10. 16. a nonmetallic element that has some of the properties of metal.
  11. 18. of or relating to a molecule made up of two atoms.