atoms

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Across
  1. 4. center of an atom
  2. 5. positive charged subatomic particle
  3. 7. add protons + neutrons
  4. 10. base of all mater
Down
  1. 1. the wight of protons and neutrons
  2. 2. no charge subatomic particle
  3. 3. negative charge subatomic particle
  4. 6. table table with all the elements
  5. 8. of an consist of a nucleus in the center
  6. 9. number protons in the nucleus