Science crossowrd

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Across
  1. 1. a subatomic particle with zero charge
  2. 3. a stable particle with a positive charge
  3. 5. the element with the catomic number of 23
  4. 7. a element with properties of metals and non metals
  5. 12. ther state of power of being or the degree to which a thing is reactive
  6. 14. a chemical element with the atomic number of 79
  7. 17. the element with the atomic number of 10
  8. 19. a element with the atomic number of 91
  9. 22. the chemical element with the atomic number of 80
  10. 23. the chemical element with the atomic number of 83
  11. 25. A numbeer of protons in an atom of an element
  12. 26. hard but liable to break or shatter easily
  13. 28. a horizontal row on a periodic table
  14. 29. an atom thats gained or lost electrons
  15. 30. a vertical column on a periodic table
Down
  1. 2. a element with no conductivity
  2. 4. a element with the atomic number of 5
  3. 6. A pure substance made up of only one atom
  4. 8. the element with the atomic number 92
  5. 9. a chemical element that forms a salt when it reacts with metal
  6. 10. the smallest component of an element
  7. 11. the element with the atomic number of 78
  8. 13. Atoms of the same element with different number of neutronds
  9. 15. the element with the atomic number 30
  10. 16. the element with atomic number 20
  11. 18. a elementary particle with negative charge
  12. 19. - the vertical column on a periodic table
  13. 20. an element that conducts electricity
  14. 21. the chemical element with the atomic number of 22
  15. 24. the central and most important part of an object, movement, or group, in the middle of cells
  16. 27. the chemical element of atomic number 88