Definitions of models

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Across
  1. 3. made up of one kind of atom
  2. 4. row of chemical elements
  3. 5. subatomic particle with neutral charge
  4. 6. column of chemical elements
  5. 8. more than one element bonded together
  6. 9. substance made up of only one kind of atom
Down
  1. 1. subatomic particle with negative charge
  2. 2. more than one different element bonded together
  3. 4. table of elements- a table of chemical elements in rows and columns
  4. 7. subatomic particle with a positive charge
  5. 9. number- charge of the nucleus