Periodic Table and Trends Review

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Across
  1. 3. positively charged ion
  2. 6. negatively charged ion
  3. 7. energy needed to remove an electron from an atom
  4. 9. most of the elements on the periodic table are these
  5. 11. number of protons in the nucleus of an atom
  6. 12. Developed his model of the periodic table in 1869
  7. 14. the ability of an atom of an element to attract electrons when the atom is in a compound
  8. 15. last name of the scientist who first grouped elements together by similar property
  9. 17. Mass of an atom
  10. 18. there are 7 of these on the periodic table
  11. 19. Mendeleev's periodic table was important because it was able to _______ new elements
Down
  1. 1. the d and f orbitals on the periodic table
  2. 2. number of elements discovered in 1913
  3. 4. reworked the periodic table and arranged it by 11 across
  4. 5. there are 18 of these on the periodic table
  5. 8. Nickname of 12 across
  6. 10. one half of the distance between the nuclei of two atoms of the same element when the atoms are joined
  7. 13. nonreactive element family
  8. 16. three elements grouped together by similar properties