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0625/03/SP/23 · question 3 of 3 in this topic

Question 11

11(a)3 marks

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

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

Your answer

Suggested time: 5 min

11(b)3 marks

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

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

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

Your answer

Suggested time: 5 min

0625/03/SP/23Cambridge IGCSE Physics 0625 · Specimen 2023 · Paper 3 · sit the whole paper