AQA A-Level Physics 3.8 Nuclear physics overview quiz quiz

The atom is solid throughout

The nucleus is negatively charged

The atom is mostly empty space

Alpha particles have no charge

Gamma

Beta

X-rays

Alpha

One eighth

One half

One quarter

One sixteenth

$T_{1/2} = \lambda \ln 2$

$T_{1/2} = \frac{\ln 2}{\lambda}$

$T_{1/2} = \frac{\lambda}{\ln 2}$

$T_{1/2} = \lambda^2$

Alpha decay

Beta-plus decay

Beta-minus decay

It is stable and will not decay

$R = r_0 A$

$R = r_0 A^2$

$R = \frac{r_0}{A}$

$R = r_0 A^{1/3}$

Because volume is proportional to $A$ and mass is proportional to $A$

Because every nucleus, whatever its element, happens to have exactly the same total mass

Because every nucleus, whatever its nucleon number, happens to have exactly the same radius

Because the density of a nucleus does not in any way depend on its overall volume

Because extra mass is created out of nothing in both of these nuclear processes

Because the products have a higher binding energy per nucleon than the reactants

Because the products always have a lower binding energy per nucleon than the reactants

Because the products of both processes are in every case strongly radioactive

$93.2$ MeV

$18.6$ MeV

$46.6$ MeV

$4.66$ MeV

To absorb surplus neutrons and so slow down or shut down the chain reaction

To carry the heat away from the reactor core to the heat exchanger and turbines

To shield the workers in the power station from the radiation produced in the core

To slow fast neutrons to thermal speeds so they can cause further fission

So that on average at least one neutron per fission causes another fission rather than escaping

So that the temperature of the sample rises high enough for nuclear fusion to begin occurring

So that the neutrons produced by each fission event are slowed down to thermal speeds

So that the gamma radiation produced by the fission reactions is fully absorbed within the sample

Its proton number only, leaving its neutron number completely unchanged

Neither its proton nor its neutron number, only its energy

Its overall nucleon number only, while leaving the proton number the same

Both its proton number and its neutron number at the very same time