February/March 2026 Paper 22

2026 · 7 questions · 42 parts · 60 marks

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7(a)Nuclear Model AtomEasy2 marks

Describe the structure of a nuclear atom.

Answer

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7(b)

P and Q are radioactive nuclei. P has 94 protons. Q has 91 protons. Each nucleus decays to form a nucleus with 92 protons.

7(b)(i)Radioactive Decay Nuclear EquationsMedium1 mark

State the type of radioactive decay experienced by P.

7(b)(ii)Radioactive Decay Nuclear EquationsMedium1 mark

State the type of radioactive decay experienced by Q.

7(c)Quarks Leptons AntiparticlesMedium2 marks

Particle X has a ratio of

\frac{charge}{mass}

equal to

+ 1.76 \times 1 0^{11}

C kg

^{- 1}

. Identify particle X.

Particle X