Periodic Project!

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Across
  1. 3. the atomic number is the number of ____ in the nucleus of an atom
  2. 6. Valence electrons are responsible for _____ bonding
  3. 9. _______ _____ increases reactivity going DOWN
  4. 11. column seventeen, row two
  5. 13. The only gas in column one
  6. 18. Column two,row four
  7. 19. _____ _____ is a measure of the size of its atoms
  8. 21. _______ has an atomic number 43
  9. 22. _____ _____ ____ are less reactive, follows trends of Alkaline
  10. 23. ____ ___ completely inert(unreactive)
  11. 25. _____ _____ is a chemical property that describes the tendency of an atom to attract electrons
Down
  1. 1. ____ ____is a system for arranging chemical elements
  2. 2. Cadimium was discovered in ____(what year)
  3. 4. _____ has 4 shells and is in column four
  4. 5. _____ is a measure of how much a substance reacts when combined with another
  5. 7. Electrons which are located in the ______ energy level of an atom
  6. 8. _____ _____ are regions surrounding the atomic nucleus containing a specific number of electrons
  7. 10. _____ ______ are the most important part of the atom
  8. 12. Largest atom on the periodic table
  9. 14. ____ boiling point is 1737 degrees celcius
  10. 15. _____ has an atomic weight of 39.098
  11. 16. _____ _____ is the inventor of the periodic table
  12. 17. ______ increases reactivity going UP
  13. 20. ____ melting point is 730 degrees celcius
  14. 24. Column seven, row seven