Chemisty terms

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Across
  1. 4. atomic number 90
  2. 6. atomic number 35
  3. 7. the basic unit of a chemical elemnent
  4. 8. atomic mass 127
  5. 9. atomic mass 52
  6. 12. nuetral charged element
  7. 13. atomic number 5
  8. 16. circles the nuclues
  9. 17. In on the periodic table
  10. 18. atomic number 3
Down
  1. 1. 1st element on the periodic table
  2. 2. atomic number 75
  3. 3. mechanic model cloud model
  4. 5. atomic mass 23
  5. 9. ray thomsons expirement
  6. 10. - element Mg
  7. 11. atomic number 6
  8. 12. atomic number 60
  9. 14. atomic mass 59
  10. 15. located inside the nucleus