Atoms and periodic table crossword puzzle

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Across
  1. 1. neutrons, electrons and protons
  2. 5. small particles that make up matter
  3. 7. a list of elements
  4. 8. an element with an atomic number of 33
  5. 9. iron(FE) arsenic(AS)
  6. 11. a mix of different elements
  7. 12. an element with an atomic number of 27
  8. 13. super reactive metals
  9. 18. A model of an atom
  10. 19. not reactive
  11. 20. The person who first made the periodic table
  12. 21. negative subatomic particle
  13. 23. transition metal
Down
  1. 2. of protons in the nucleus of an atom
  2. 3. the element symbol is NA
  3. 4. a row on the periodic table
  4. 6. something that gives information about an element
  5. 10. element with 1 as atomic number
  6. 14. symbol for the element gold
  7. 15. number that usually includes a decimal
  8. 16. positive subatomic particle
  9. 17. neutral subatomic particle
  10. 22. post-transition metal
  11. 24. they symbol for lithium