periodic table

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Across
  1. 3. H
  2. 5. each numbered row
  3. 7. Na
  4. 8. number of periods in the periodic table
Down
  1. 1. o
  2. 2. collum
  3. 3. He
  4. 4. group 2 period 4
  5. 6. number of groups in the periodic table