Physics (AS & A Level) · Oct / Nov 2025 · Paper 44 · Question 8
9702
As printed in the paper
The question as text
Oxygen-15 (15 8O) is radioactive and has a half-life of 2.04 minutes. The decay of oxygen-15 produces positrons. For this reason, oxygen-15 is sometimes used as a tracer in positron emission tomography (PET scanning).
Read automatically from the paper; the printed page above is exact.
Show the answer and mark scheme
8(a)[2]
8(b)(i)[2]
8(b)(ii)[1]
8(c)(i)[1]
8(c)(ii)[2]
8(c)(iii)[4]
8(d)(i)[1]
8(d)(ii)[2]
Make a free account to save your answers and see your weak topics and ask the AI why a wrong answer is wrong.