things that were covered after the last test we took

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Across
  1. 3. who went looking for neutrinos from the sun
  2. 5. ___ can go right through each other and cancel each other
  3. 7. positrons travel backwards in time and bounce off ___ rays causing them to then travel forward in time
  4. 8. in the spectrum chart P stands for ___
  5. 11. an ___ is any device where a low power input controls a higher power output
  6. 13. P type has a ___ charge
  7. 14. in the spectrum chart D stands for ___
  8. 17. neutrinos have no ___ charge
  9. 18. a ___ is the lightest particle with a positive charge
  10. 20. Anderson observed ___ at Caltech in 1932
  11. 21. ___ are electrically neutral
Down
  1. 1. in mid 1930 ___ predicted that nuclear force would be carried by particles and flipped between protons and nucleus
  2. 2. in the spectrum chart F stands for ___
  3. 4. in the spectrum chart S stands for ___
  4. 6. ___ machines have no power supply and give more force out than in
  5. 9. Pauli suggested that maybe there is a(n) ___ particle
  6. 10. strong, nuclear, electromagnetic, and weak are all types of ___
  7. 12. N type has a ___ charge
  8. 15. ___'s 1920 uncertainty principle
  9. 16. De ___ said particles have wave properties
  10. 19. atoms exist, hydrogen spectra, and the periodic table are all ___