Vocab Set #5

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Across
  1. 3. the # of protons in the nucleus of an atom, which determines an elements place on the periodic table
  2. 6. theory that atoms are solid, indestructible spheres
  3. 8. a column of elements in the periodic table
  4. 9. hard but liable to break or shatter easily
Down
  1. 1. the theory that an atom can be divided into a nucleus and electrons
  2. 2. father of nuclear physics
  3. 4. the mass of an atom of a chemical element
  4. 5. a horizontal row in the periodic table
  5. 7. the theory that an atom can be divided into fluid and electrons