science

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Across
  1. 4. Pb
  2. 6. he saw an atom as a positive sphere with negative electrons stuck in it like raisins in a loaf of bread
  3. 10. a principle that Werner Karl Heisenberg discovered that for a very small particle like electron, its location cannot be exactly known and how it is moving.
  4. 11. it is the negatively charged particle of an atom
  5. 13. NaCl
  6. 14. Na
Down
  1. 1. he pictured an atom as a tiny, indestructible sphere endowed with mass
  2. 2. developed a mathematical equation to describe the hydrogen atom
  3. 3. _______ number - atomic number = number of neutrons
  4. 5. Hg
  5. 7. atomic ____________ is a volume of space around the nucleus where the electron is most likely to be found
  6. 8. a certain theorist proposed that all things came from this one prime material
  7. 9. this number specifies a property of an orbital or an electron
  8. 12. he proposed that the probability that electrons will be found in certain locations around the nucleus of an atom
  9. 15. Fe