Periodic Table Crossword

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Across
  1. 2. Has the same number of protons but different numbers of neutrons
  2. 3. good conductors of heat and electricity
  3. 6. When an atom gives up one or more electrons it becomes positive
  4. 9. Earth Metals Found in foods and never found freely in nature
  5. 11. When an atom gains one or more electrons it bFamibecomestive
  6. 13. Vertical Columns
  7. 15. Forms when atoms gain or lose electrons to become stable
  8. 17. Electrons The electrons found in the outermost energy level
  9. 19. Energy the amount of energy needed to remove the valence electron of an atom
  10. 20. + Charge
Down
  1. 1. Poor conductors of heat and electricity
  2. 4. the measure of an atom's ability to attract electrons
  3. 5. radius The measure of the size of an atom
  4. 7. Gases Stable elements that exist on their own
  5. 8. conduct heat and electricity better than non-metals but not as well as Metals.
  6. 10. Horizontal Rows
  7. 12. the most active Non-Metals
  8. 14. Metals Most reactive group
  9. 16. No electric Charge
  10. 18. - Charge