The Periodic Table

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Across
  1. 2. What kind of ice cream did Thompson's theory say that an atom looks like?
  2. 5. Are rows that tell us how many energy shells (rings) and element has
  3. 7. Metals are good __________of heat and electricity.
  4. 10. This element is an example of a nonmetal
  5. 11. Are columns that tell us how many valence electrons an element has
  6. 16. This scientists theory says that an atom looked like a pool ball
  7. 17. What is something else that the alkali and alkaline earth metals have in common?
  8. 22. How many electrons does sodium (Na) have?
  9. 24. These metals are good conductors of electricity
  10. 26. The metals in the middle of the periodic table are called...
  11. 29. These elements are nonreactive
  12. 30. What can you say about the theory of the how the atom developed over time?
  13. 33. Has an atomic number 18
  14. 34. Hydrogen, helium, oxygen, neon, and krypton are some of the most abundant elements found in the
  15. 37. Properties of both metals and nonmetals
  16. 39. These elements are dull, brittle, and poor conductors
  17. 40. The energy level where the valence electrons are
  18. 41. How many energy shells does Radon (Rn) have?
  19. 42. The noble gases are unstable
Down
  1. 1. Hydrogen, oxygen, potassium, and calcium are some of the most abundant elements found in the
  2. 3. This group of elements are salt forming
  3. 4. This scientists theory stated that the atom looked like moons orbiting a planet
  4. 6. What element caused the Hindenburg to explode?
  5. 8. Hydrogen, magnesium, titanium, and aluminum are some of the most abundant elements found in the
  6. 9. A chart showing all of the elements arranged in a repeating patters
  7. 12. This group or family is an example of a metalloid
  8. 13. Indicates the amount of protons in the nucleus
  9. 14. This element is a metal
  10. 15. This element is a metalloid
  11. 18. All elements have 2 electrons in the first shell (ring) except for
  12. 19. How many main groups is the periodic table categorized?
  13. 20. What is something that the alkali and alkaline earth metals have in common?
  14. 21. The element airships are now filled with.
  15. 23. The scientist that discovered the periodic table
  16. 25. Building blocks of elements
  17. 27. The atomic number can also be the number of electrons in an atom
  18. 28. Have properties of both metals and non-metals
  19. 31. How many protons does Platinum (Pt) have?
  20. 32. How many electrons does Germanium (Ge) have?
  21. 35. A characteristic that allows an element to be turned into thin sheets by hammering
  22. 36. Silicon has how many valence electrons?
  23. 38. A substance that can sometimes conduct electricity.