DP Physics (last assessment 2024)

Question 21M.2.SL.TZ1.b

Date	May 2021	Marks available	[Maximum mark: 1]	Reference code	21M.2.SL.TZ1.b
Level	SL	Paper	2	Time zone	TZ1
Command term	Identify	Question number	b	Adapted from	N/A

[Maximum mark: 1]

21M.2.SL.TZ1.b

Radioactive uranium-238 $({}_{92}^{238}U)$ produces a series of decays ending with a stable nuclide of lead. The nuclides in the series decay by either alpha (α) or beta-minus (β⁻) processes.

Thallium-206 $({}_{81}^{206}{Tl})$ decays into lead-206 $({}_{82}^{206}{Pb})$ .

Identify the quark changes for this decay.

[1]

Markscheme

udd→uud
OR
down quark changes to up quark ✓

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Core

Core » Topic 7: Atomic, nuclear and particle physics » 7.3 – The structure of matter

Core » Topic 7: Atomic, nuclear and particle physics

Question 21M.2.SL.TZ1.b

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