CROSSWORD PUZZLE

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Across
  1. 1. The positively charged particle found in the nucleus.
  2. 4. The particle with no electrical charge.
  3. 7. The scientist who proposed that electrons move in fixed energy levels.
  4. 8. The building block of matter that cannot broken down by chemical means.
  5. 9. The center of an atom containing protons and neutrons.
  6. 10. The negatively charged particle discovered by J.J. Thomson.
Down
  1. 2. The scientist who discovered the nucleus through the gold foil experiment.
  2. 3. Discovered in 1803 by John Dalton; atoms are tiny, indivisible and identical element
  3. 5. An atom is made out of a sphere of positive charges with negatively charged electron embedded in it.
  4. 6. The scientist who proposed the "plum pudding" model of the atom.