May/June 2026 Paper 22

2026 · 6 questions · 40 parts · 60 marks

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2(a)(i)Atomic Structure IsotopesEasy1 mark

Protons, neutrons and electrons are released with the same velocity from a source. Figure 2.1 shows the movement of two of these types of particle when they travel between oppositely charged plates.

Figure 2.1, two vertical charged plates facing each other above a labelled particle source: the left plate marked 'charge on plate +' and the right plate marked 'charge on plate −'. Two curved paths leave the source between the plates: curve x sweeps sharply left, ending with an arrowhead pointing toward the positive (left) plate; curve y rises with only a slight rightward curve, ending with an arrowhead pointing up, deflected far less than curve x.

Name each type of particle that produces the deflection shown by curves x and y.

2(a)(ii)Atomic Structure IsotopesEasy1 mark

Suggest why the particles producing curve y are deflected less than the particles producing curve x.

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2(b)(i)Tables Graphs Data AnalysisEasy1 mark

A student considers the information in Table 2.1 and proposes hypothesis 1. hypothesis 1: 'Atoms with a higher nuclear charge are always larger.'

atom	atomic number	mass number	atomic radius / nm
A	6	12	0.077
B	17	37	0.099
C	14	28	0.117

Identify a pair of atoms from Table 2.1 that supports hypothesis 1.

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2(b)(ii)Tables Graphs Data AnalysisEasy1 mark

Identify a pair of atoms from Table 2.1 that shows hypothesis 1 is false.

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2(b)(iii)Periodic Table TrendsMedium2 marks

Explain why atom A is smaller than atom C.

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