SL Paper 3
Nuclear fission of 235U is one source of electrical energy that has a minimal carbon footprint.
Natural uranium needs to be enriched to increase the proportion of 235U. Suggest a technique that would determine the relative abundances of 235U and 238U.
[1]
a.i.
Explain how 235U fission results in a chain reaction, including the concept of critical mass.
[3]
a.ii.
Suggest one reason why there is opposition to the increased use of nuclear fission reactors.
[1]
b.