Write a nuclear equation for the indicated decay of each nuclide. a. U-234 (alpha) b. Th-230 (alpha)

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Identify the type of decay: Alpha decay involves the emission of an alpha particle, which is a helium nucleus \( ^4_2\text{He} \).

Write the general form of an alpha decay equation: \( ^A_Z\text{X} \rightarrow ^{A-4}_{Z-2}\text{Y} + ^4_2\text{He} \).

Determine the initial nuclide: The problem states U-234, which is uranium with a mass number of 234 and an atomic number of 92, so \( ^{234}_{92}\text{U} \).

Apply the alpha decay equation to U-234: \( ^{234}_{92}\text{U} \rightarrow ^{230}_{90}\text{Th} + ^4_2\text{He} \).

Verify the conservation of mass and atomic numbers: Ensure that the sum of mass numbers and atomic numbers on both sides of the equation are equal.

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59s

주요 개념

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

Nuclear Decay

Nuclear decay is the process by which an unstable atomic nucleus loses energy by emitting radiation. This can occur in various forms, including alpha decay, beta decay, and gamma decay. In alpha decay, the nucleus emits an alpha particle, which consists of two protons and two neutrons, resulting in a new element with a lower atomic number.

Alpha Particle

An alpha particle is a type of ionizing radiation ejected from the nucleus during alpha decay. It is composed of two protons and two neutrons, making it identical to a helium nucleus. The emission of an alpha particle decreases the atomic number of the original nuclide by two and the mass number by four, leading to the formation of a different element.

Nuclear Equation

A nuclear equation represents the transformation of one nuclide into another during a nuclear reaction. It includes the symbols for the reactants and products, along with their respective atomic numbers and mass numbers. For alpha decay, the equation typically shows the original nuclide, the emitted alpha particle, and the resulting nuclide, ensuring that both mass and charge are conserved.