Rusenko 442 nuclear chemistry

question

fuel rods in a nuclear reactor are made of
answer

uranium
question

What is used as a coolant inside the nuclear reactor
answer

water
question

how does the nuclear plant create electricity?
answer

using a turbine
question

What is SCRAM
answer

Emergency shutdown of a nuclear reactor

 

Stands for : Safety Control Rod Axe Man

question

What color of light has the most energy?
answer

violet
question

What color of light has the least energy
answer

red
question

Light is given off when 
answer

an excited electron goes back to a ground state electron
question

 radiograph
answer

picture taken using gamma radiation

 

– can be used to detect a defect in a weld

question

Speed of different frequencies
answer

– same

 

– all frequencies and wavelengths travel at same speed

 

– gamma rays  radio waves – same speed

 

question

how do the energy of different frequencies compare?
answer

higher frequency -> more energy

 

gamma rays – most energy

radio waves – least energy

question

relationship between frequency and wavelength
answer

inverse

 

higher frequency – shorter wavelength (gamma)

 

lower frequency – longer wavelength (radio)

question

half life
answer

amount of time it takes for a radioactive sample to decrease by half
question

Heisenberg’s Uncertainty principle
answer

can never know the location and momentum of an electron
question

Schrodinger
answer

developed mathematical equation to predict most probably position of an electron

;

– describes these probable positions as an electron cloud

question

protons and neutrons can be broken down further into particles called

;

answer

leptons (lighter weight);

;

and;

;

hadrons (heavier);

;

both are unstable – exist only in nuclear reactions

question

after one half-life has gone by
answer

50% of the radioactive material will remain
question

after a second half life
answer

25% of the radioactive material will remain

;

1st half life: 100% -; 50%

;

2nd half life: 50% -; 25%

;

3rd half life: 25% -; 12.5 %

question

control rods moderate the nuclear reaction by
answer

absorbing neutrons
question

Is Uranium a naturally occurring element?
answer

yes
question

which has more energy:

;

violet light or ultraviolet light

answer

ultraviolet light
question

alpha radiation
answer

4

;;;; He

2

;

;

ie.;;;;;;;;;; 238;;;;;;;;;; 234;;;;;;;;;;; 4

;;;;;;;;;;;;;;;;;; U; —>       Th    +    He

                92             90            2

 

question

Beta radiation
answer

  0

      e

   1-

 

 

   ex.   14          14        0

             C —>     N   +   e

            6           7        1-

question

  0

      e

   1-

 

 

   ex.   14          14        0

             C —>     N   +   e

            6           7        1-

answer

 

beta radiation

question

4

     He

2

 

 

ie.           238           234            4

                   U  —>       Th    +    He

                92             90            2

 

answer

alpha radiation
question

gamma radiation
answer

γ

high energy photon

ex.     60                60             0

              Co —>       Co  +       γ

          27                27             0

question

γ

high energy photon

 

ex.     60                60             0

              Co —>       Co  +       γ

          27                27             0

 

answer

gamma radiation
question

0

     e

1+

 

ex.    25             25          0

           Al —>       Mg  +     e

        13             12         1+

answer

positron
question

0

     e

1+

 

ex.    25             25          0

           Al —>       Mg  +     e

        13             12         1+

answer

positron
question

electron capture
answer

 

 

ex.      18         0           18

              F   +    e  —>    O

            9        1-            8

 

notice – electron in the reactants!

question

ex.      18         0           18

              F   +    e  —>    O

            9        1-            8

 

notice – electron in the reactants!

answer

electron capture
question

fission
answer

 – starts when neutrons hit a heavy element and splits it into 2 smaller elements and extra neutrons

 

ex.  235          1            90        144          1

           U   +     n   –>      Rb  +     Cs  + 2  n

        92          0            37          55          0

 

 

question

 – starts when neutrons hit a heavy element and splits it into 2 smaller elements and extra neutrons

 

ex.  235          1            90        144          1

           U   +     n   –>      Rb  +     Cs  + 2  n

        92          0            37          55          0

answer

fission
question

fusion
answer

“fusing” or combining 2 small nuclei into 1 larger nuclei

 

 

 

ex.         2                 4

           2  H       —>    He

             1                 2

 

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