Periodic Table

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Across
  1. 1. The periodic table is arranged by the number of ________.
  2. 5. The oxides of elements near the line that separates metals and non-metals have this property.
  3. 6. This is the halogen with the lowest boiling point.
  4. 7. The left most vertical set of elements are known as the ______ metals.
  5. 9. This line separates the metals and the non-metals.
  6. 12. Metals prefer to form ________.
Down
  1. 2. The elements that between the second and third vertical set of elements.
  2. 3. This is the ion form of a non-metal.
  3. 4. This is what a horizontal set of elements is known as.
  4. 8. Most metals form _______ oxides.
  5. 10. A vertical set of elements has the same number of ________ electrons.
  6. 11. A vertical set of elements is a _______.
  7. 13. These oxides are usually formed by non-metals.