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2023 · Specimen · 0625/03 | Q11

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CIE-0625-2023-SP-p03 · Question 11

Available practice: 75 of 80 marks. Parts 8(b), 10(d) await marking support. Scores cover available parts only.

The nuclide notation ᴬ_Z X describes the nucleus of one type of atom.

(a)On Fig. 11.1 draw a line from each symbol to the correct description for that symbol.

Fig. 11.1 — see the question text for what it shows
[3 marks]

A radioactive isotope has a half-life of 6.0 years. A sample of this isotope has a mass of 12 mg.

(b)Calculate the mass of this isotope that remains in the sample after 18 years.

Answer guidance

Calculate Show your working. The method can earn marks even when the final value is wrong, and a bare answer often cannot.

[3 marks]

0625/03/SP/23Cambridge IGCSE Physics 0625 · Specimen 2023 · Paper 3 · Question 11