Periodic Table

12345678910111213141516171819
Across
  1. 5. the negatively charged particles in an atom
  2. 7. comprised of protons, electrons and neutrons
  3. 8. the energy level of an atom
  4. 9. a compound with 2 hydrogen atoms and 1 oxygen atom
  5. 11. elements with 7 electrons on their outer shell
  6. 13. a molecule made up of two or more different elements
  7. 14. the element that is present in banana
  8. 15. the element with the symbol Al
  9. 16. the total number of protons and neutrons in an atom
  10. 18. also known as proton number
  11. 19. anything that has mass and takes up space
Down
  1. 1. the scientist whose work resulted in the modern Periodic Table
  2. 2. the gases found in group 0 of the Periodic table
  3. 3. the element with the symbol Na
  4. 4. the horizontal rows of the Periodic Table
  5. 6. use in the treatment of water
  6. 7. the group 1 elements
  7. 10. a molecule with the same atoms
  8. 12. the element with the symbol Ca
  9. 17. movement of fluid particles