Practise

Question bank

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

12 questions

SA-OC-AT-0011 markL1 FoundationCalculatorSubatomic particles

How many neutrons are in an atom of

^{23}_{11}\mathrm{Na}

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SA-OC-AT-0021 markL1 FoundationCalculatorSubatomic particles

How many electrons are in an atom of

^{40}_{20}\mathrm{Ca}

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SA-OC-AT-0031 markL1 FoundationCalculatorSubatomic particles

The relative charge of a neutron is

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SA-OC-AT-0041 markL1 FoundationCalculatorElectron shells

The electronic configuration of magnesium (

Z=12

) is

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SA-OC-AT-0061 markL1 FoundationCalculatorIsotopes

Isotopes of an element have

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SA-OC-AT-0121 markL1 FoundationCalculatorSubatomic particles

Which particle has a relative charge of

-1

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SA-OC-AT-0051 markL2 StandardCalculatorElectron shells

An element has electronic configuration 2,8,7. Which group and period is it in?

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SA-OC-AT-0072 marksL2 StandardCalculatorIsotopes

Chlorine is 75%

^{35}\mathrm{Cl}

and 25%

^{37}\mathrm{Cl}

. Calculate its relative atomic mass.

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SA-OC-AT-0082 marksL2 StandardCalculatorIsotopes

Boron is 20%

^{10}\mathrm{B}

and 80%

^{11}\mathrm{B}

. Calculate its relative atomic mass.

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SA-OC-AT-0091 markL2 StandardCalculatorSubatomic particles

Almost all the mass of an atom is in its

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SA-OC-AT-0101 markL2 StandardCalculatorSubatomic particles

An atom has 17 protons and 18 neutrons. What is its mass number?

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SA-OC-AT-0113 marksL3 ExamCalculatorIsotopes

Copper has isotopes

^{63}\mathrm{Cu}

and

^{65}\mathrm{Cu}

and

A_r=63.5

. Calculate the percentage abundance of copper-63.

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