The Periodic Table

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Across
  1. 2. It's in the top right conner letters are HE
  2. 4. its letters are CU
  3. 6. Short word letters SN
  4. 8. Its initial doesn't go but the letters are AU
  5. 11. Another common one but also the name of a coin NI
  6. 12. The first metalloid on the staircase B
  7. 13. It's on the staircase and its letter is SI
  8. 15. Most common metal initials are FE
  9. 17. A planet name but it's a metal know as HG
  10. 18. Foil, Pretty well known letters AL
Down
  1. 1. Is a metal initial IN
  2. 2. the only different one on the left side
  3. 3. on the staircase
  4. 5. It's nonmetal and initial is O
  5. 7. Its initial is N and it's a nonmetal
  6. 9. Its initial is NE
  7. 10. The last metalloid on the staircase PO
  8. 13. The second metalloid initials are SI
  9. 14. on the left side of the table
  10. 16. on the right side of the table