The Periodic Table

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Across
  1. 7. elements who highest occupied s sublevel and a nearby f sublevel contain electrons
  2. 10. have properties that can vary by condition
  3. 11. elements with their s and p sublevels filled
  4. 16. half the distance between the nuclei of two atoms of the same element when joined
  5. 17. number of outer electrons in s and p sublevels that noble gases have
  6. 18. poor conductors of heat and electricity
  7. 20. a negatively charged atom, gained electrons
  8. 21. a vertical column of elements on the periodic table
Down
  1. 1. group 1A elements
  2. 2. energy required to remove an electron from an atom
  3. 3. element with 2 electrons in the fourth energy level
  4. 4. good conductors of heat and electricity
  5. 5. an atom with the highest energy electron is in the d orbital
  6. 6. group 2A elements
  7. 8. ability of an atom to attract electrons in a compound
  8. 9. the charge of the ion that all elements in group 6A form
  9. 12. scientist who revolutionized the organization of the periodic table
  10. 13. the horizontal rows on the periodic table
  11. 14. a metalloid with chemical properties similar to carbon
  12. 15. nonmetals of group 7A
  13. 19. a positively charged atom, lost electrons