Chemistry Crossword

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Across
  1. 3. The chemical symbol "Au"
  2. 5. A positively charged subatomic particle.
  3. 6. An Ion with a positive charge.
  4. 8. The center of an atom.
  5. 9. Vertical row of elements in the periodic table.
  6. 12. A negatively charged subatomic particle.
  7. 13. Total number of protons and neutrons.
  8. 14. The number of protons in the nucleus.
  9. 15. The smallest particle that has the properties of an element.
  10. 16. An atom that has lost or gained an electron.
Down
  1. 1. Same number of protons but a different number of neutrons.
  2. 2. A neutral-charged subatomic particle.
  3. 4. An electron in the outermost energy level.
  4. 7. An Ion with a negative charge.
  5. 10. Region to find a lot of atoms.
  6. 11. Horizontal row of elements in the periodic table.
  7. 14. Symbol for Atomic Mass Unit,