structure of matter

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Across
  1. 4. table of elements all the chemicals and elements
  2. 6. structure of all matter
  3. 7. is a horizontal row of the periodic table
  4. 8. a group of atoms bonded together
  5. 10. is a proton without electrical charge
Down
  1. 1. is a particle in a atom that has no electrical charge
  2. 2. is a positive elective charge
  3. 3. two more separated elements
  4. 5. made of only of atoms with the same protons
  5. 6. number is the number of protons an a nucleus
  6. 9. a column of the periodic table