Atomic Structure and Radioactivity - SS1 Physics Past Questions and Answers - page 4
31
Discuss the limitations of the Bohr Model and the development of Quantum Mechanics.
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32
Radioactivity is the spontaneous emission of:
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A
Electrons
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B
Protons
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C
Alpha particles
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D
Neutrons
33
The process in which an unstable atomic nucleus emits an alpha particle is known as:
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A
Alpha decay
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B
Beta decay
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C
Gamma decay
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D
Nuclear fission
34
The half-life of a radioactive substance is defined as the time it takes for:
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A
Half of the substance to decay
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B
All of the substance to decay
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C
One-fourth of the substance to decay
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D
None of the above
35
Beta decay involves the emission of:
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A
Protons
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B
Electrons
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C
Neutrons
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D
Alpha particles
36
Gamma radiation is:
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A
A stream of protons
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B
A stream of electrons
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C
High-energy electromagnetic radiation
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D
The emission of alpha particles
37
The process in which a heavy nucleus splits into two smaller nuclei is called:
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A
Alpha decay
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B
Beta decay
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C
Gamma decay
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D
Nuclear fission
38
The decay of a radioactive substance follows a:
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A
Linear pattern
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B
Exponential pattern
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C
Logarithmic pattern
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D
Random pattern
39
Radioactive isotopes are used in:
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A
Medical imaging
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B
Power generation
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C
Carbon dating
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D
All of the above
40
The unit used to measure the amount of radioactivity is:
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A
Watt
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B
Coulomb
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C
Becquerel
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D
Ampere
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