Physics 9702 · AS & A Level · Atoms, nuclei and radiation
Atoms, nuclei and radiation — practice question
During the decay of a $^{210}_{84}\text{Po}$ nucleus, an $\alpha$-particle is released with energy $5.3\,\text{MeV}$. The decay is shown by the nuclear equation $^{210}_{84}\text{Po} \rightarrow \ ^A_B X + \alpha + \text{energy}$.
(a(i))[1]
On Fig. 7.1, fill in the number and the name of the particle, or particles, shown by $A$ and $B$ in the nuclear equation.
(a(ii))[1]
State the form of energy transferred to the $\alpha$-particle in the decay of $^{210}_{84}\text{Po}$.
(b)[2]
A sample of polonium $^{210}_{84}\text{Po}$ emits $7.1 \times 10^{18}$ $\alpha$-particles in one day. Calculate the mean power output from the energy of the $\alpha$-particles.
Worked solution & mark scheme
This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “A = 206 nucleons; B = 82 protons” …