Elements and parts of atoms

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Across
  1. 4. The locations outside the nucleus where electrons are found.
  2. 6. A metal found in milk that helps keep your bones strong.
  3. 10. This is a positively charged particle found in the nucleus.
  4. 14. A pungent gas that is used to swimming pools safe.
  5. 15. This element is named after someone on our good man window, element 106.
  6. 16. The most abundant element in the universe and the first one on the Periodic Table.
  7. 17. This element has the symbol Au.
Down
  1. 1. A metal that reacts explosively with water and has the symbol Na.
  2. 2. This metal is used in sinkers and was used in Roman plumbing.
  3. 3. The most common gas on Earth, element number 7.
  4. 5. This element has the symbol Li.
  5. 7. A negatively charged particle that circles the nucleus.
  6. 8. The center of an atom containing protons and neutrons.
  7. 9. Is used to make bright coloured lights, element 12.
  8. 10. The horizontal (side to side) part of the Periodic Table.
  9. 11. This is found in the nucleus, but has no charge.
  10. 12. Is essential for respiration and has the symbol O.
  11. 13. The vertical (up and down) part of the Periodic Table.