Jourden's Periodic Table

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Across
  1. 3. a negatively charged subatomic particle found in the energy level of an atom
  2. 5. the center of an atom; made up of protons and neutrons
  3. 6. a horizontal row of elements in the periodic table
  4. 8. any atoms having the same number of protons but a different number of neutrons
  5. 10. another name for metalloid
  6. 12. the elemnts that are usually poor conductors of heat and electricity
  7. 13. group 18 or 8A
  8. 16. the total number of protons and neutrons in the nucleus of an atom
  9. 18. a vertical column of elements in the periodic table
  10. 19. an element that has properties of both a metal and nonmetal
  11. 20. group 17 or 7A
Down
  1. 1. a positively charged subatomic particle in the nucleus of an atom
  2. 2. group 16 or 6A
  3. 4. a neutral subatomic particle in the nucleus of an atom
  4. 7. the smallest particle that has the properties of an element
  5. 9. another name for period
  6. 11. the number of protons in the nucleus of an atom
  7. 14. group 1 or 1A
  8. 15. another name for group
  9. 17. the elements that are good conductors of heat and electricity