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Nuclear Physics - Test 2


1. The term, atomic energy, refers to energy obtained from:

    A. the electron clouds which surround atoms
    B. reactions between two different atoms
    C. endothermic chemical reactions
    D. within the nucleus of the atom


2. Uranium-238 decays to give an alpha particle plus:

    A. element 90
    B. element 89
    C. element 91
    D. neutrons


3. Which of the following has the greatest penetrating power?

    A. alpha particles
    B. beta particles
    C. electrons
    D. gamma particles


4. The sun's spectrum is an example of:

    A. a mass spectrum
    B. a continuous spectrum
    C. a bright line spectrum
    D. an absorption spectrum


5. Tritium has an atomic weight of:

    A. 1
    B. 2
    C. 4
    D. 3


6. Transuranium elements:

    A. are made by nuclear fusion
    B. result from natural radioactive decay
    C. have atomic numbers greater than 92
    D. have greater half-lives than uranium


7. Which of these isotopes are fissionable when struck by slow neutrons?

    A. U-234
    B. U-238
    C. Np-239
    D. Pu-239


8. In order for two electrons to occupy a given orbital:

    A. their spin directions must be the same
    B. their spin directions must be opposite
    C. their spin directions must be perpendicular
    D. they must both be electrically neutral


9. The orbital that has the highest energy is:

    A. the ground state
    B. the one with the highest quantum number
    C. the one with the lowest quantum number
    D. closest to the nucleus


10. Tin is element 50, meaning that:

    A. its mass is 50 amu
    B. its mass number is 50
    C. it has 50 protons in its nucleus
    D. it has 50 neutrons in its nucleus












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