Nuclear radiation is dangerous to humans.
0 1 . 1 Nuclear radiation can change atoms into ions.
Which type of particle is lost when an atom changes into an ion?
[1 mark]
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Electron
Neutron
Proton
0 1 . 2 A nucleus of uranium-238 238
92U emits an alpha particle 4
2He and decays
into thorium 234
90 Th .
Which nuclear equation shows this decay?
[1 mark]
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4
2He 238
92U →
234
90Th +
4
2He 238
92U →
234
90Th +
4
2
He 238
92U →
234
90 + Th
3
(03) G/Jun24/8465/2F
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Turn over U
0 1 . 3 How does the penetrating power of alpha particles compare with the penetrating
power of beta particles?
[1 mark]
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Alpha particles are less penetrating than beta particles.
Alpha particles have the same penetrating power as beta particles.
Alpha particles are more penetrating than beta particles