Periodic Table 1

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Across
  1. 5. The element, __________, has an electronic configuration of 2.8.1.
  2. 6. The elements in the Periodic Table are arranged in order of increasing _____ number.
  3. 9. The element, __________, can be found in Period 2, Group 14.
  4. 10. Elements in the same group have the same number of _________ electrons.
  5. 11. A _______ refers to a horizontal row of elements.
  6. 12. Group 17 elements exist as ____________ molecules.
  7. 13. Elements in the same period have the same number of electron __________.
Down
  1. 1. A group refers to a vertical column of elements.
  2. 2. Group 18 elements (noble gases) exist as _________ elements as they have a fully filled outer-most shell.
  3. 3. Non-metals tend to _______ electrons.
  4. 4. Metals tend to __________ electrons.
  5. 7. Elements with the same number of valence (outermost) electrons have similar _________ properties.
  6. 8. Across a period, the metallic character of the elements __________.