DP Physics (first assessment 2025)

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Question 21M.1A.HL.TZ1.39

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Date May 2021 Marks available [Maximum mark: 1] Reference code 21M.1A.HL.TZ1.39
Level HL Paper 1A Time zone TZ1
Command term Question number 39 Adapted from N/A
39.
[Maximum mark: 1]
21M.1A.HL.TZ1.39

The graphs show the variation with time of the activity and the number of remaining nuclei for a sample of a radioactive nuclide.

What is the decay constant of the nuclide?

A.  0.7 s-1

B.  1 s-1

C.  10.7 s-1

D.  1.5 s-1

[1]

Markscheme

A

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