Periodic Table and Atom Review

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Across
  1. 3. Which family name correctly represents the elements in Group 1 on the Periodic Table?
  2. 5. Atoms of the same element may have________________________ mass numbers.
  3. 6. The best explanation for the organization of Mendeleev's Periodic Table by atomic mass rather than atomic number is that Mendeleev organized the table prior to the discovery of the atomic __________________.
  4. 9. Sulfur-34 would have _________________ neutrons.
  5. 11. Noble gases are generally ______________.
  6. 14. The atomic radius increases from__________ to bottom in a group.
  7. 16. This element has a density of 2.26
  8. 17. Nickel-59 has has 28 electrons and 28 ____________________.
  9. 19. The alpha particles in Rutherford’s experiments were used to bombard sheets of _____________.
  10. 20. This scientist provided a basis for ordering elements in the modern PeriodicTable.
  11. 21. Isotopes of the same element have different _______________.
  12. 23. The number of valence electrons in Group 2 elements is _________.
Down
  1. 1. Which element would be hardest to remove an electron from (sodium, aluminum, sulfur, or chlorine)?
  2. 2. Atoms are considered electrically ________________ when the number of electrons equal the number of protons.
  3. 4. As the atomic number increases within a group of elements, the atomic radius usually _________________.
  4. 7. Which model of the atom showed electrons in specific, fixed orbits?
  5. 8. As the __________ number on the Periodic Table increases so does the number of electrons.
  6. 10. Thomson, Rutherford and Bohr modeled their experiments and their theories after this scientist's model of the atom.
  7. 12. The ___________ occurring isotopes used to calculate the average atomic mass of an element?
  8. 13. The cathode ray experiments led to what discovery?
  9. 15. Elements which have similar properties are in the same _____________.
  10. 18. Which of the following atoms would have the largest ionic radius (lithium, sodium, potassium, or cesium)?
  11. 21. A mercury isotope with 80 protons and 120 neutrons has a _____________ number of 200.
  12. 22. The physical property Group 18 elements have in common is their _________ at room temperature.