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Edexcel | Physics 4PH0 | W 17 1 | Q12

W 17 1
12
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The diagram shows the main parts of a nuclear reactor.

W 17 1
12
(a)
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4 Mark s

Draw a straight line linking each part of the reactor to its correct purpose.

5 correct lines score 4 marks;;;;

4 or 3 correct lines score 3 marks;;;

2 correct lines score 2 marks;;

1 correct line scores 1 mark;

W 17 1
12
(b)
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1 Mark

Which of these is a nuclear fission product?

  A alpha particles

  B electrons

  C neutrons

  D uranium nuclei

C neutrons; 

W 17 1
12
(c)
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4 Mark s

Describe the process of nuclear fission.

 

   

any four from: 

MP1. neutron absorbed by;

 

MP2. uranium(-235) nucleus;

 

 

MP3. causing it to split;

 

MP4. into 2 daughter products /nuclei

/ isotopes;

 

MP5. releasing further neutrons /energy; 

 

 

 

only accept precise

terminology

allow

hits/collides/eq

 

 

 

 

 

allow named

products 

 

 

W 17 1
12
(d)
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3 Mark s

State three ways in which nuclear fission differs from radioactive decay.

 

 

any three comparisons from (however

expressed):

MP1. decay is random but fission is not;

 

MP2. fission induced by input particle but

decay occurs without an input particle;

 

MP3. fission produces 2 daughter nuclei

but decay produces only 1;

 

MP4. α or β are emitted from decay but

not from fission; 

 

 MP5. decay rate can’t be altered but rate

of fission can;

 

MP6. Number of fissionable isotopes

much less than radioactive isotopes;  

 

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