2022 · Specimen · 9702/02 | Q7

0/32parts marked · 0 of 53 marks

Question (7 of 7)6 marks · Practise this topic →

Options

Available practice: 53 of 60 marks. Parts 2(b)(iv), 4(b)(iii), 6(b)(v) await marking support. Scores cover available parts only.

A nucleus X decays by emitting a β⁺ particle to form a new nucleus, ²³₁₁Na.

(a)State the number of protons and the number of neutrons in nucleus X.

Answer guidance

State A short answer. No explanation is needed, and adding one cannot earn extra marks.

[2 marks]

(b)State one similarity between a β⁺ particle and a β⁻ particle.

Answer guidance

State A short answer. No explanation is needed, and adding one cannot earn extra marks.

[1 mark]

(c)State the quark composition of a meson.

Answer guidance

State A short answer. No explanation is needed, and adding one cannot earn extra marks.

[1 mark]

A hadron consists of two down quarks and a charm quark.

(d)Determine the charge of the hadron. Show your working.

Answer guidance

Show The result is given, so every step of the reasoning is what earns the marks.

[2 marks]

9702/02/SP/22Cambridge International AS & A Level Physics 9702 · Specimen 2022 · Paper 2 · Question 7