(a(i))[2]
State the values of $W$, $X$, $Y$ and $Z$.
(a(ii))[2]
Explain why mass appears to be not conserved in the reaction.
(b)[1]
The reaction is spontaneous. Explain the meaning of spontaneous.
Physics 9702 · AS & A Level · Atoms, nuclei and radiation
Atoms, nuclei and radiation — practice question
A polonium nucleus $^{210}_{84}\text{Po}$ is radioactive and undergoes decay by emitting an $\alpha$-particle. The nuclear equation for this decay is $^{210}_{84}\text{Po} \rightarrow {}^{W}_{X}Q + {}^{Y}_{Z}\alpha$.
Worked solution & mark scheme
This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Correct nucleon and proton numbers: $W=206, X=82, Y=4, Z=2$” …
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