Chapter 9 Crossword .... Krista Summers

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Across
  1. 4. discovered the neutron
  2. 5. electrons move in definite orbits around the nucleus
  3. 6. spherical cloud of varying density
  4. 8. law of conservation of matter.
  5. 9. all elements are composed of indivisible particles
Down
  1. 1. large heavy like protons, no electrical charge, located in the nucleus of an atom
  2. 2. tiny very light particles, negative electrical charge, and move around the outside of the nucleus
  3. 3. universe was made of empty space and tiny bits of stuff
  4. 7. much much larger and heavier than electrons, positive charge, located in the nucleus of an atom