Periodic Table and Trends Review

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