Periodic Table 1

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