Chapter 9- Lillian Wilhelm

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Across
  1. 2. made of adoms
  2. 3. who made the early model of the atom?
  3. 6. Dmitri Mendeleiv designed this
  4. 8. an electron in the outermost energy level
  5. 10. What has no electrical charge at all?
Down
  1. 1. Cobalt is an example of this on the periodic table
  2. 4. What have a posotive charge?
  3. 5. This means the same thing as groups on the periodic table.
  4. 7. an atom that carries an electrical charge
  5. 9. What is 2000 times larger than protons?