MNM

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Across
  1. 2. Xe
  2. 3. Co
  3. 5. the things that are on the periodic table
  4. 8. He
  5. 10. U
Down
  1. 1. two elements combined
  2. 4. As
  3. 6. Md
  4. 7. Pr
  5. 9. Fe