Atomic Structure and the Periodic Table

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Across
  1. 2. positive ion
  2. 5. Group 8A
  3. 6. outermost electron
  4. 7. Group 1A
  5. 8. same electron configuration
  6. 10. mass number
  7. 12. energy to remove electrons
Down
  1. 1. Group 7A
  2. 3. atomic number
  3. 4. ability to attract atoms
  4. 9. negative ion
  5. 11. Group 2A