Kismet times crossword of the day

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Across
  1. 2. positively charged center of an atom
  2. 4. positive charge
  3. 7. undergoes the change
  4. 8. located in outer most shell
  5. 9. what you are left with after the change
  6. 10. no charge
Down
  1. 1. columns or family
  2. 3. where the electrons are located
  3. 5. negative charge
  4. 6. measure of the atoms
  5. 9. horizontal on the periodic table