chemistry

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Across
  1. 3. a process that involves rearrangement
  2. 4. chemical bond if the outer shell nucleus
  3. 8. negative charge
  4. 10. neutral charge
Down
  1. 1. amount of energy that a system described
  2. 2. the system of electron
  3. 5. positive charge
  4. 6. the horizontal rows of the periodic
  5. 7. periodic table same chemical elements
  6. 9. source of nuclear energy