Chemistery

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Across
  1. 2. horizontal rows in the periodic table
  2. 4. how many protons does argon have
  3. 6. H
  4. 9. a particle in the nucleus without an electric charge
  5. 10. when two elements bond together
  6. 11. group 18 in the periodic table
  7. 12. how many protons does hydrogen have
  8. 14. a substance made up of only one type of atom
  9. 20. negatively charged particles
  10. 22. small, dense region at the centre of the atom
  11. 25. made up of two or more different types of atoms that are chemically joined
  12. 26. has 26 protons
  13. 27. total number of protons and electrons in an atom
  14. 30. how many electrons does boron have
  15. 31. what is the smallest building blocks of matter
  16. 33. i am used to blow up balloons
  17. 35. Number of protons in the atom
  18. 37. how many neutrons does carbon have
  19. 38. an atom no longer neutrally charged because it has lost electrons
  20. 39. vertical rows in the periodic table
Down
  1. 1. B
  2. 3. made up of two or more different substances that are mixed but not chemically bonded together
  3. 5. Ne
  4. 7. how many electrons does potassium have
  5. 8. who created the periodic table
  6. 13. Zn
  7. 15. elements in the periodic table arranged in order of ___
  8. 16. Ci
  9. 17. F
  10. 18. S
  11. 19. positively charged particles
  12. 21. Ca
  13. 23. Na
  14. 24. Ar
  15. 28. group 1 elements that are metals
  16. 29. Li
  17. 30. how many neutrons does lithium have
  18. 32. when atoms gain an electron and have more electrons than protons
  19. 34. when atoms lose electrons and have more protons than electrons
  20. 36. Cu