The Periodic Table

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Across
  1. 2. How many electrons will fit in the 3rd shell?
  2. 5. What are the outer shells electrons called?
  3. 7. Elements are the building blocks of all _____
  4. 9. Which electron shell is most important in determining how an element will react?
  5. 10. Atomic ____ is the number on the bottom of the element
  6. 11. O is the symbol for which element?
  7. 14. What are the horizontal rows on the PT called?
  8. 15. What are the different materials on the table referred to as?
  9. 16. If an atom has 5p+ in the nucleus, then its atomic number is...
Down
  1. 1. n0 is the symbol for what?
  2. 3. e- is the symbol for what?
  3. 4. What are the vertical columns on the PT called?
  4. 6. Mass number minus the ____ number equals the number of neutrons
  5. 8. True or false: electrons can move about between different atoms.
  6. 10. Who was the famous scientist who first put the periodic table together?
  7. 12. True or false: none of the elements are harmful.
  8. 13. How many sub-atomic particles are there?
  9. 14. p+ is the symbol for what?