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Question 18M.1.HL.TZ1.37

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Date May 2018 Marks available [Maximum mark: 1] Reference code 18M.1.HL.TZ1.37
Level HL Paper 1 Time zone TZ1
Command term Question number 37 Adapted from N/A
37.
[Maximum mark: 1]
18M.1.HL.TZ1.37

Two radioactive nuclides, X and Y, have half-lives of 50 s and 100 s respectively. At time t = 0 samples of X and Y contain the same number of nuclei.

What is  number of nuclei of X undecayed number of nuclei of Y undecayed  when t = 200 s?

A.     4

B.     2

C.      1 2

D.      1 4

[1]

Markscheme

D

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