Exam-style question
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What is the primary distinction between nuclear decay and chemical change?.
- A.Nuclear decay involves changes in the nucleus, while chemical change involves changes in electron arrangements.
- B.Nuclear decay occurs at a constant rate, while chemical change occurs randomly.
- C.Nuclear decay results in the formation of new elements, while chemical change does not.
- D.Nuclear decay is always exothermic, while chemical change can be either exothermic or endothermic.
Model answer
What a good answer should say
- Nuclear decay involves changes in the nucleus, while chemical change involves changes in electron arrangements.
Explanation
Why this works
Nuclear decay refers to the process where unstable atomic nuclei lose energy by emitting radiation, resulting in changes to the nucleus itself. In contrast, chemical change involves the rearrangement of electrons in atoms, leading to the formation of new substances without altering the nuclei.
This distinction is crucial as nuclear decay can lead to the transformation of one element into another, while chemical changes do not affect the atomic identity. Therefore, nuclear decay applies to processes involving nuclear instability, while chemical changes are relevant in reactions between different chemical substances.
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