Chemistry chp. 4 Vocab

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Across
  1. 4. subatomic particle with a charge of negative electricity
  2. 7. the central and most important part of an atom
  3. 14. there is a fundamental limit to how well you can simultaneously know the position and momentum of a particle
  4. 15. a beam of electrons emitted from the cathode of a high-vacuum tube
  5. 16. the basic unit of a chemical element
  6. 17. equation used to describe the wave properties of matter
Down
  1. 1. regions of space around the nucleus of an atom where an electron is likely to be found
  2. 2. the lowest energy state of an atom or other particle
  3. 3. Bohr's electron energy level
  4. 5. every compound is formed of elements combined in specific ratios by mass that are unique for that compound
  5. 6. energy emissions come only in certain amounts or quantities
  6. 8. a subatomic particle of about the same mass as a proton but without an electric charge
  7. 9. subatomic particle occurring in all atomic nuclei, with a positive electric charge
  8. 10. an emission spectrum that consists of a continuum of wavelengths
  9. 11. the number of protons in the nucleus of an atom
  10. 12. spectrum an emission spectrum consisting of separate isolated lines
  11. 13. a helium nucleus emitted by some radioactive substances, originally regarded as a ray
  12. 18. a particle representing a quantum of light or other electromagnetic radiation