Periodic Table

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Across
  1. 3. The group with all three phases of matter
  2. 4. An alkaline earth metal in period three
  3. 9. Only group with a full outer shell
  4. 10. The group Sodium is in.
Down
  1. 1. This group has multiple oxidation states
  2. 2. Created the first periodic table
  3. 5. These types of elements are semiconductors
  4. 6. Metals do this with their electrons
  5. 7. The number of valence electrons carbon has
  6. 8. The first periodic table was put in order by...