
(a)
Interpretation:
The nuclear symbol and electrical charge of an alpha particle and a beta particle are to be predicted.
Concept introduction:
The radioactive decay is defined as the spontaneous emission of particles or radiation due to the breaking of an atomic nucleus. An alpha particle, beta particle and gamma rays are emitted during the radioactive decay. The radioactive emissions are measured using instruments like Geiger counter and scintillation counter.
(b)
Interpretation:
The alpha, beta and gamma rays are to be arranged in order of decreasing penetrating power.
Concept introduction:
The radioactive decay is defined as the spontaneous emission of particles or radiation due to the breaking of an atomic nucleus. An alpha particle, beta particle and gamma rays are emitted during the radioactive decay. The radioactive emissions are measured using instruments like Geiger counter and scintillation counter.

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Chapter 20 Solutions
Introductory Chemistry: An Active Learning Approach
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