atoms and waves

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Across
  1. 2. the total number of the protons and neutrons is the atomic_____
  2. 5. carry a positive electrical charge
  3. 8. are responsible for binding the quarks to one another.
  4. 10. ____ ray are stream of negatively charged particles
  5. 11. carry no electrical charge at all
  6. 13. last name of the person who discovered the nucleus within an atom
  7. 15. the basic building blocks of ordinary matter
  8. 17. a single disturbance that moves from point to point through a medium is called a ___.
  9. 18. is a property of a wave that most people can spot quickly and easily, and use it as a way of telling waves apart.
  10. 19. what rays can travel in straight lines, produce mechanical effects?
  11. 20. bond/When atoms share electrons it is called a_____
Down
  1. 1. the highest part of a transverse wave is
  2. 3. atoms that have the same number of protons but different numbers of neutrons are called
  3. 4. atoms with an electrical charge due to giving up or taking on more electrons are_____
  4. 6. the term ___ refers to protons and neutrons.
  5. 7. waves transfer____
  6. 9. if the particles of the medium are vibrating to and fro in the same direction of energy transport, then the wave is a ____ wave.
  7. 12. as a wave passes across a boundary into a new medium, _____would NOT change
  8. 14. carry a negative electrical charge
  9. 16. the smallest piece of a compound that keeps its chemical properties