Periodic Table Crossword

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Across
  1. 5. Rows (across) on the periodic table
  2. 7. How likely an element is to form bonds with another element
  3. 8. Bond between a nonmetal and metal
  4. 13. Atoms of the same element that have a different number of neutrons
  5. 15. Atomic ____ is the number of protons an atom has
  6. 16. The smallest particle of an element that retains the elements properties
  7. 17. The electrons on the outer orbital
  8. 18. Bond between nonmetals
  9. 19. 118 of these on the periodic table
  10. 20. An atom with a charge
Down
  1. 1. Atomic ____ is the number of protons plus number of
  2. 2. Columns (up/down) on the periodic table
  3. 3. Noble ____ are a group of rare ____ that have great stability and low reaction rates
  4. 4. A group of atoms bonded together
  5. 6. Electron _____ is rings where electrons reside
  6. 9. Elements that are shiny, good conductors, and are on the left on the periodic table
  7. 10. Referred to as the father of the periodic table
  8. 11. Danish Physicist made a model
  9. 12. Particles like protons neutrons electrons etc
  10. 14. Elements that are dull, brittle, and often a gas at room temperature