Periodic(ish) Table

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Across
  1. 1. Cerium’s abbreviation
  2. 3. AN:54
  3. 5. AW:12
  4. 8. Y
  5. 9. Ag
  6. 10. From France(gross)
  7. 11. Atoms electrical alignment
  8. 13. number of electrons in first orbital
  9. 14. Manganese’s abbreviation
  10. 20. A table with elements that no one should be forced to memorize
  11. 21. Fe
Down
  1. 2. Negatively charged part of an atom
  2. 4. Part of an atom’s nucleus with no charge
  3. 5. AM:133
  4. 6. AN:1
  5. 7. AM:197
  6. 12. smallest particle of ordinary matter
  7. 15. AN:28
  8. 16. K
  9. 17. AN:14
  10. 18. AN:78
  11. 19. Ra
  12. 20. Positively charged part of an atom