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Across 3. how many waves in a second 4. the act of taking in radiation, usually done by a bond, nuclei or electrons 6. several atoms of the same element that feel the same field in NMR 8. the field used during NMR spectroscopy 9. the act of giving out radiation by a bond, nuclei or electron movement 11. shape of a peak from a proton adjacent to one other proton 12. centre of an atom 14. the name given to a recorded signal in spectroscopy 16. the name given to the energy used in most forms of spectroscopy 19. the conventional units for the y axis in IR spectroscopy 21. another word for a positive hydrogen 22. the reciprocal of wavelength 24. two atoms of the same element with different masses 25. Wavelength of radiation that is between visible and X-ray 26. speed of light divided by frequency 27. shape of a peak from a proton with no neighbours 28. the name for a particular common collection of atoms in organic chemistry

Down 1. wavelength of radiation that interacts best with organic bonds 2. shape of a peak from a proton with three neigbours 3. parts a molecule is broken into during mass spectrometry 5. hold two atoms together 6. the name given to different parts of a molecule in NMR 7. neutral nucleon 10. the less conventional units for the y axis in IR spectroscopy 13. the units of the x axis in NMR 15. the directional change that nuclei undergo in a magnetic field 17. the name of the x axis in NMR 18. positive nucleon 20. the effect of neigbouring protons on a 1H NMR peak 23. the name given to repetitive