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Question 19N.2.SL.TZ0.b(ii)

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Date November 2019 Marks available [Maximum mark: 2] Reference code 19N.2.SL.TZ0.b(ii)
Level SL Paper 2 Time zone TZ0
Command term Calculate Question number b(ii) Adapted from N/A
b(ii).
[Maximum mark: 2]
19N.2.SL.TZ0.b(ii)

A stationary nucleus of uranium-238 undergoes alpha decay to form thorium-234.

The following data are available.

Energy released in decay                         4.27 MeV
Binding energy per nucleon for helium      7.07 MeV
Binding energy per nucleon for thorium    7.60 MeV

Calculate the ratio kinetic energy of alpha particlekinetic energy of thorium nucleus.

[2]

Markscheme

states or applies conservation of momentum ✔

ratio is «EkαEkTh=p22mαp22mTh=2344» 58.5 ✔

NOTE: Award [2] for bald correct answer

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