Chapter 6 Periodic Table

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Across
  1. 2. electronegativity values _________ from top to bottom within a group.
  2. 7. What element is a liquid at room temperature that is in period six?
  3. 10. the energy required to remove an electron from an atom.
  4. 12. the ability of an atom of an element to attract electrons when the atom is in a compound
  5. 15. gases The elements in group 8A are called? (2 Words)
  6. 16. how many electrons does the d orbital hold?
  7. 19. The elements in group 1A are called? (2words)
  8. 23. number The modern day periodic table is arranged by increasing _________ ________?
  9. 24. The elements in group 2A are called? (3 words)
  10. 26. the group B elements that are usually displayed in the main body of a periodic table? (2 words)
Down
  1. 1. When the elements are arranged in order of increasing atomic number, there is a periodic repetition of their physical and chemical properties
  2. 3. atomic size (radius) _________ from top to bottom within a group
  3. 4. How many elements were identified by 1700
  4. 5. Elements in group 1A-7A are often referred to as? (2 Words)
  5. 6. an ion with a negative charge.
  6. 8. an ion with a positive charge.
  7. 9. most of the elements on the periodic table are?
  8. 11. poor conductors of heat and electric current
  9. 13. an atom or group of atoms that has a positive or negative charge.
  10. 14. radius one half of the distance between the nuclei of two atoms of the same element when the atoms are joined? (2 Words)
  11. 17. The nonmetals of Group 7A are called?
  12. 18. good conductors of heat and electric current.
  13. 20. generally has properties that are similar to those of metals and nonmetals
  14. 21. Positive and negative ions form when __________ are transferred between atoms.
  15. 22. Early chemist used____________ to sort the elements into groups
  16. 25. How did Mendeleev organize his periodic table (2 words)