Periodicity

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Across
  1. 3. Positively charged ion
  2. 5. Who did their periodic table by atomic number
  3. 6. Proton Pull *blank* to the right
  4. 8. Who invented the periodic table
Down
  1. 1. Negatviely charged ion
  2. 2. Atomic Radius *blank* to the right
  3. 4. What is the electron configuration for Helium
  4. 5. Who did their periodic table by atomic mass
  5. 7. In what order do the sublevels go