Test On Chapter 25 Nuclear Chemistry 10/3/10 25.1

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Test on Chapter 25 Nuclear Chemistry 10/3/10

  
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  • 1. 
    How does an unstable nuclues release energy?
    • A. 

      By emitting raduation before radioactive decay

    • B. 

      By emitting raduation after radioactive decay

    • C. 

      By emitting raduation during radioactive decay

    • D. 

      By emitting raduation in between radioactive decay


  • 2. 
    What are the three main types of nucear radiation?
    • A. 

      Alpha , beta , gamma

    • B. 

      Fusion, fission , fassion

    • C. 

      Half life, radioisotope, scuntillation

    • D. 

      Transmutation, transuranium, geiger


  • 3. 
    What part of an atom undergoes change during radioactive decay?
    • A. 

      Neutron

    • B. 

      Electron

    • C. 

      Proton

    • D. 

      Nucleus


  • 4. 
    How is an atomic number of a nucleus changed by alpha decay?
    • A. 

      The atomic number decreases by two

    • B. 

      The atomic number decreases by one

    • C. 

      The atomic number decreases by three

    • D. 

      The atomic number decreases by zero


  • 5. 
    How is the atomic number of a nucleus changed by beta decay?
    • A. 

      The atomic number increases by threee

    • B. 

      The atomic number increases by two

    • C. 

      The atomic number increases by one

    • D. 

      The atomic number increases by zero


  • 6. 
    How is the atomic number of a nucleus changed by gamma decay?
    • A. 

      The emission of gamma radiation changes the atomic number by two.

    • B. 

      The emission of gamma radiation changes the atomic number by one.

    • C. 

      The emission of gamma radiation does change the atomic number.

    • D. 

      The emission of gamma radiation does not change the atomic number.


  • 7. 
    How is the atomic mass number of a nucleus changed by alpha decay?
    • A. 

      Mass number decreases by two

    • B. 

      Mass number decreases by four

    • C. 

      Mass number increases by four

    • D. 

      Mass number increases by two


  • 8. 
    How is the atomic mass of a nucleus changed by beta decay?
    • A. 

      The mass number changes by one

    • B. 

      The mass number will change

    • C. 

      The mass number will change by two

    • D. 

      The mass number does not change


  • 9. 
    How is the atomic mass number of the nucleus changed by gamma delay?
    • A. 

      The emission of gamma radiation does change the mass number.

    • B. 

      The emission of gamma radiation does not change the mass number.

    • C. 

      The emission of gamma radiation increases the mass number by two.

    • D. 

      The emission of gamma radiation decreases the mass number.


  • 10. 
    Which of the three kinds of radiation described in this section in the most penetrating?
    • A. 

      Alpha radiation

    • B. 

      Gamma radiation

    • C. 

      Beta radiation


  • 11. 
    Atomic numbers _________________.
    • A. 

      Not charged

    • B. 

      Repell

    • C. 

      Charge

    • D. 

      Balanced


  • 12. 
    Mass numbers must be __________________.
    • A. 

      Charged

    • B. 

      Unbalanced

    • C. 

      Repell

    • D. 

      Balanced


  • 13. 
    What particles in an atom are involved in chemical reactions?
    • A. 

      Nuclei electron

    • B. 

      Valence electrons

    • C. 

      Nuclear nucleus

    • D. 

      Radioisotopes


  • 14. 
    What element was named in honor of the Curies and is it radioactive ?
    • A. 

      Curium, yes

    • B. 

      Carbon, yes

    • C. 

      Radium, yes

    • D. 

      Uranium,yes


  • 15. 
    ______________involves the transfer or sharing of elcetrons;the nuclei remains unchanged 
    • A. 

      Nuclear reactions

    • B. 

      Chemical reactions


  • 16. 
    ___________ involves changes in the nuclei of the atoms.
    • A. 

      Chemical reactions

    • B. 

      Nuclear reactions


  • 17. 
    What is radiation?
    • A. 

      The penetrating rays and positive particles emitted by a radioactive source.

    • B. 

      The penetrating rays and particles emitted by a radioactive source.

    • C. 

      The non-penetrating rays and particles emitted by a radioactive source.

    • D. 

      The penetrating rays and particles emitted by a non-radioactive source.


  • 18. 
    _________________ worked with Marie and Pierrie to study the ability of uranium salts that had been exposed to sunlight to fog photographic film plates. 
    • A. 

      Megana

    • B. 

      March

    • C. 

      Granger

    • D. 

      Becquerel


  • 19. 
    What makes a nucleus unstable?
    • A. 

      It has too many or too few neutrons relative to the number of electrons.

    • B. 

      It has too many or too few neutrons relative to the number of protons.

    • C. 

      It has too many or too few neutrons relative to the number of neutrons.


  • 20. 
    Which kind of particle would need to be emitted to balance the equation?
    • A. 

      Positron

    • B. 

      Neutron

    • C. 

      Electron

    • D. 

      Proton


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