Physics 9702 · AS & A Level · Fundamental particles

Fundamental particles — practice question

A neutron undergoes decay by releasing a $\beta^-$ particle.
(a)[2]

Complete the equation below to represent this decay. $^{1}_{0}\text{n} \rightarrow \; \ldots\ldots\ldots\ldots\ldots\ldots + \; \ldots\ldots\; \beta^- + \; \ldots\ldots\ldots\, \bar{\nu}$

(b)[1]

State the name of the particle shown by the symbol $\bar{\nu}$.

(c)[1]

State the name of the class (group) of particles that contains $\beta^-$ and $\bar{\nu}$.

(d(i))[1]

State the quark structure of the neutron.

(d(ii))[1]

State the change to the quark structure when the neutron decays.

Worked solution & mark scheme

This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: $^1_p$, $^0_{-1}\beta$, and $^0_0\nu$ are identified

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