The Periodic Table

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Across
  1. 1. Helps determine the number of electrons in an element.
  2. 4. Positive charged particle
  3. 6. The number of protons and neutrons in an element.
  4. 7. Negative charged particle
  5. 10. Neutral charged particle
Down
  1. 2. The number of protons in an element.
  2. 3. A pure substance consisting of atoms.
  3. 5. Elements of group 17
  4. 8. The horizontal columns on the periodic table.
  5. 9. The vertical columns on the periodic table.