chemistry final crossword

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Across
  1. 1. Fission:is a process in nuclear physics in which the nucleus of an atom splits into two or more smaller nuclei as fission products,
  2. 3. chemical element of atomic number
  3. 7. series of events that are regularly repeated in the same order.
  4. 9. chemical element of atomic number 2
  5. 15. as a source of nuclear energy.
  6. 16. the chemical element with the symbol H and atomic number 1.
  7. 18. emission of energy as electromagnetic waves or as moving subatomic particles.
  8. 19. radioactive isotope of hydrogen with a mass approximately
  9. 20. particular place or point.
  10. 22. hydride:DescriptionThe helium hydride ion or hydroxide helium ion or helium is a cation with the chemical formula HeH⁺.
  11. 23. to change, fail, or give way; not stable.
Down
  1. 1. close to; almost.
  2. 2. separate and distinct.
  3. 4. measure of the amount of matter contained in or constituting a physical body.
  4. 5. :a subatomic particle of about the same mass as a proton but without an electric charge,
  5. 6. stable subatomic particle with a charge of negative electricity
  6. 8. strength and vitality required for sustained physical or mental activity.
  7. 10. change which is a result or consequence of an action or other cause.
  8. 11. imparting or exchanging of information or news..
  9. 12. container, typically made of glass or plastic
  10. 13. :Payload is the carrying capacity of an aircraft or launch vehicle,
  11. 14. wind:the continuous flow of charged particles from the sun which permeates the solar system.
  12. 17. stable isotope of hydrogen with a mass approximately twice that of the usual isotope.
  13. 21. photon is a type of elementary particle
  14. 24. colorless, odorless reactive gas