DP Physics (last assessment 2024)

Question 18M.2.SL.TZ1.b.iii

Date	May 2018	Marks available	[Maximum mark: 1]	Reference code	18M.2.SL.TZ1.b.iii
Level	SL	Paper	2	Time zone	TZ1
Command term	State	Question number	b.iii	Adapted from	N/A

b.iii.

[Maximum mark: 1]

18M.2.SL.TZ1.b.iii

The radioactive nuclide beryllium-10 (Be-10) undergoes beta minus (β–) decay to form a stable boron (B) nuclide.

The initial number of nuclei in a pure sample of beryllium-10 is N₀. The graph shows how the number of remaining beryllium nuclei in the sample varies with time.

Beryllium-10 is used to investigate ice samples from Antarctica. A sample of ice initially contains 7.6 × 10¹¹ atoms of beryllium-10. State the number of remaining beryllium-10 nuclei in the sample after 2.8 × 10⁶ years.

[1]

Markscheme

1.9 × 10¹¹

[1 mark]

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Core

Core » Topic 7: Atomic, nuclear and particle physics » 7.1 – Discrete energy and radioactivity

Core » Topic 7: Atomic, nuclear and particle physics

Question 18M.2.SL.TZ1.b.iii

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