Structure of matter

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Across
  1. 2. a group of elements in the periodic table
  2. 4. a row of elements in the periodic table
  3. 6. number number of protons inside the nucleus
  4. 9. example: hydrogen
  5. 10. no charge
Down
  1. 1. structure of all matter
  2. 3. table holds all the elements
  3. 4. positive atom
  4. 5. negative atom
  5. 7. when there is a bound between atoms
  6. 8. made from 2+ atoms that are different elements