Periodic Table Crossword

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Across
  1. 2. A neutrally charged particle
  2. 7. The way electrons move in an atom
  3. 8. The chemist that created the periodic table
  4. 11. Elements that have properties from both metals and non-metals
  5. 12. The process of ions being lost or formed
  6. 13. Discovered neutrons
  7. 17. The chemist that modernized the periodic table
  8. 20. radius The size of an atom
  9. 21. The middle of an atom made of protons and neutrons
  10. 23. The second most reactive group on the periodic table
  11. 24. How much the element weighs
  12. 26. The letters that represent the elements EX: C for Carbon
  13. 27. A negatively charged particle
  14. 29. The reactivity of an element
  15. 30. Elements that do not combine easily with other elements
Down
  1. 1. Known as the "father of chemistry"
  2. 3. Elements that form Group 17 on the periodic table
  3. 4. The number of protons in the element
  4. 5. A positively charged particle
  5. 6. A chart that organizes the elements
  6. 9. The electron(s) on the outer shell of an atom
  7. 10. Elements that have valence electrons in two shells
  8. 14. Seventeen metallic elements that are important parts of many devices
  9. 15. Elements on the right of the periodic table
  10. 16. A group of elements that have the same number of valence electrons
  11. 18. An atom that has lost or gained electrons
  12. 19. The six elements that create Group 1A
  13. 22. A row of elements with the same number of electron shells
  14. 25. Discovered that electrons travel in an orbit
  15. 28. Elements that lose electrons easily