Weird Symbols

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Across
  1. 2. Symbol is Na
  2. 5. Symbol is K
  3. 8. Symbol is Sb
  4. 9. Symbol is Fe
  5. 10. Symbol is Au
  6. 11. Symbol is As
Down
  1. 1. Symbol is Cu
  2. 3. Symbol is W
  3. 4. Symbol is Pb
  4. 6. Symbol is Sn
  5. 7. Symbol is Ag