Q26 · 2022 · Paper 1Simple familiar1 mark
QUESTION 26
Carbon-14 undergoes nuclear decay to nitrogen-14.
14 6 C → 147 N + e − + ve
List the two types of particles whose total number must be conserved in this reaction.
WORKED SOLUTION
1 markQCAA guide · typeset solution
ANSWER
See worked solution below.
Worked solution
Baryons
Leptons
• identifies baryons and leptons [1 mark]
One QCAA sample method typeset for web; criterion wording is adapted from the official marking guide.
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