DP Physics (last assessment 2024)

Question 21M.2.HL.TZ2.4a.i

Date	May 2021	Marks available	[Maximum mark: 2]	Reference code	21M.2.HL.TZ2.4a.i
Level	HL	Paper	2	Time zone	TZ2
Command term	Write down	Question number	a.i	Adapted from	N/A

a.i.

[Maximum mark: 2]

21M.2.HL.TZ2.4a.i

During electron capture, an atomic electron is captured by a proton in the nucleus. The stable nuclide thallium-205 ( ${}_{81}^{205}{Tl}$ ) can be formed when an unstable lead (Pb) nuclide captures an electron.

(a.i)

Write down the equation to represent this decay.

[2]

Markscheme

${}_{82}^{205}{Pb}$ ✓

${}_{- 1}^{0}e AND {}_{0}^{0}ν_{e}$ ✓

Syllabus sections

Core

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

Core » Topic 7: Atomic, nuclear and particle physics

Question 21M.2.HL.TZ2.4a.i

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