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A level: Radioactivity Questions

 

Q7.

(a) Sketch a graph to show how the number of neutrons, N, varies with the number of protons, Z, for stable nuclei over the range Z = 0 to Z = 80. Draw a scale on the N axis. (2)

(b) On the same graph, enclosing each region by a line, indicate the region in which nuclides are likely to decay, by

(i) emission, labelling the region A,

(ii) emission, labelling the region B,

(iii) emission, labelling the region C.

(3 marks)

(c) Complete the table.

mode of decay

change in proton number Z

change in neutron number N

emission

–2

 

 emission

 

 

 emission

 

 

e- capture

 

 

p emission

 

0

n emission

0

 

(3 marks)

(Total 6 marks)