Practise

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Original exam-style questions, mapped to your syllabus. Answers are checked for mathematical equivalence and every attempt updates your mastery.

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2730 questions · page 13 of 137 · choose a topic above to narrow them down

SA-5054-NP1-0041 markL1 FoundationCalculatorNuclides & isotopes

Isotopes of an element have

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SA-5054-NP1-0051 markL1 FoundationCalculatorAtomic structure

In the alpha-scattering experiment, most alpha particles passed straight through the gold foil. This showed that

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SA-5054-NP2-0011 markL1 FoundationCalculatorα, β, γ

Which type of radiation is the most strongly ionising?

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SA-5054-NP2-0021 markL1 FoundationCalculatorα, β, γ

Which radiation is stopped by a sheet of paper?

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SA-5054-NP2-0031 markL1 FoundationCalculatorα, β, γ

Gamma radiation is

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SA-5054-NP2-0041 markL1 FoundationCalculatorα, β, γ

A beta particle is

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SA-5054-NP2-0051 markL1 FoundationCalculatorDecay equations

^{226}_{88}\text{Ra}

decays by alpha emission. State the proton number of the new nucleus.

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SA-5054-NP3-0012 marksL1 FoundationCalculatorHalf-life

A source has an activity of

800

Bq. Calculate its activity after

3

half-lives.

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SA-5054-NP3-0022 marksL1 FoundationCalculatorHalf-life

The activity of a sample falls from

400

counts/min to

100

counts/min in

10

days. Calculate the half-life in days.

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SA-5054-NP3-0031 markL1 FoundationCalculatorHalf-life

What fraction of a radioactive sample remains after

4

half-lives? Give your answer as a decimal.

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SA-5054-NP3-0051 markL1 FoundationCalculatorUses & safety

A smoke alarm contains a source that emits

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SA-5054-NP4-0011 markL1 FoundationCalculatorFission

Nuclear fission is

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SA-5054-NP4-0021 markL1 FoundationCalculatorFusion

The Sun releases energy by

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SA-5054-NP4-0031 markL1 FoundationCalculatorFission

A chain reaction is possible in uranium-235 because each fission

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SA-5054-NP4-0041 markL1 FoundationCalculatorFission

In a nuclear reactor, the control rods

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SA-5054-NP4-0051 markL1 FoundationCalculatorFission

The moderator in a nuclear reactor

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SA-5054-PS1-0011 markL1 FoundationCalculatorMeasurements

A student investigates how the length of a pendulum affects its period. The independent variable is

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SA-5054-PS1-0021 markL1 FoundationCalculatorMeasurements

In the same pendulum experiment, which should be kept constant as a control variable?

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SA-5054-PS1-0031 markL1 FoundationCalculatorMeasurements

Three timings are

2.31

2.35

s and

2.33

s. Calculate the mean.

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SA-5054-PS1-0041 markL1 FoundationCalculatorMeasurements

Which is the correct heading for a column of time readings in seconds?

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