The History Of The Periodic Table

12345678910111213141516171819
Across
  1. 1. Thomson Discovered the electron and experimented with the cathode ray tube.
  2. 3. Schrodinger Developed the wave equation to describe the electron's motion.
  3. 4. The recurring trends that are seen in the element properties.
  4. 9. Coined the term atom
  5. 10. Atom Has a nucleus consisting of a proton bearing one unit of positive electrical charges; and an electron bearing one unit of negative electrical charge, is also with the nucleus.
  6. 12. The one who discovered the Atom.
  7. 16. A subatomic particle with a positive electrical charge.
  8. 17. A small particle with a negative charge that is found in all atoms.
  9. 18. A form of a chemical element in which the atoms have the same number of protons but with different numbers of neutrons.
  10. 19. bonded together.
Down
  1. 1. Chadwick Confirmed the existence of neutrons.
  2. 2. Electrons orbiting the nucleus at fixed energy levels.
  3. 3. His discovery of canal rays aided in the discovery of protons later.
  4. 5. Rutherford Determined atoms mostly consist of empty space, being most of its mass exists in the Nucleus.
  5. 6. One of the three subatomic particles that make up an atom.
  6. 7. A substance created from combining two or more metals.
  7. 8. Different structural forms of the exact metal.
  8. 11. Molecules Molecules only containing 2
  9. 13. The structure in a cell that contains the chromosomes.
  10. 14. "The basic unit of chemical elements.
  11. 15. Dalton Built on Democritus' theory with the use of: evidence prom experiments showing atoms exist.