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Ch.20 - Radioactivity and Nuclear Chemistry
Tro - Chemistry: A Molecular Approach 4th Edition
Tro4th EditionChemistry: A Molecular ApproachISBN: 9780134112831당신이 사용하는 게 아니라요?교과서 변경
모든 교과서Tro 4th EditionCh.20 - Radioactivity and Nuclear Chemistry문제 61
20장, 문제 61

A breeder nuclear reactor is a reactor in which nonfissionable (nonfissile) U-238 is converted into fissionable (fissile) Pu-239. The process involves bombardment of U-238 by neutrons to form U-239, which then undergoes two sequential beta decays. Write nuclear equations for this process.

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Identify the initial reaction: U-238 is bombarded by a neutron (n) to form U-239. Write the nuclear equation: \( ^{238}_{92}\text{U} + ^{1}_{0}\text{n} \rightarrow ^{239}_{92}\text{U} \).
Recognize that U-239 undergoes beta decay. In beta decay, a neutron is converted into a proton, emitting a beta particle (\( \beta^- \)) and an antineutrino. Write the first beta decay equation: \( ^{239}_{92}\text{U} \rightarrow ^{239}_{93}\text{Np} + \beta^- \).
Understand that Np-239 (neptunium-239) also undergoes beta decay. Write the second beta decay equation: \( ^{239}_{93}\text{Np} \rightarrow ^{239}_{94}\text{Pu} + \beta^- \).
Combine the equations to show the overall process: U-238 is converted to Pu-239 through neutron capture and two beta decays.
Review the concept of beta decay: In beta decay, a neutron in the nucleus is transformed into a proton, increasing the atomic number by 1 while the mass number remains unchanged.

주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Nuclear Fission and Fusion

Nuclear fission is the process by which a heavy nucleus splits into smaller nuclei, releasing energy and neutrons. In contrast, nuclear fusion involves the combining of light nuclei to form a heavier nucleus. Understanding these processes is crucial for grasping how breeder reactors operate, as they rely on fission reactions to generate energy and produce fissile material.
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가이드 코스
03:29
Band of Stability: Nuclear Fission

Beta Decay

Beta decay is a type of radioactive decay in which a beta particle (an electron or positron) is emitted from an atomic nucleus. In the context of the breeder reactor, U-239 undergoes two beta decays to transform into Pu-239. This process changes the atomic number of the element, which is essential for understanding the conversion of U-238 to Pu-239.
추천 영상:
가이드 코스
03:01
Beta Decay

Nuclear Reactions and Equations

Nuclear reactions involve changes in an atom's nucleus and can be represented by nuclear equations that show the reactants and products. These equations must balance both mass and atomic numbers. Writing the nuclear equations for the conversion of U-238 to Pu-239 requires knowledge of how to represent the neutron bombardment and subsequent beta decays accurately.
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가이드 코스
02:06
Nuclear Binding Energy
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