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Mastering physics solutions half life and radioactive dating

Unstable nuclei decay. However, some nuclides decay faster than others. For example, radium and polonium, discovered by the Curies, decay faster than uranium. This means they have shorter lifetimes, producing a greater rate of decay. In this section we explore half-life and activity, the quantitative terms for lifetime and rate of decay.
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Half Life and Radiometric Dating - Physics | OpenStax

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31.5: Half-Life and Activity

Becquerel accidentally found that a uranium-rich mineral emitted invisible, penetrating rays that could darken a photographic plate. In , the French physicist Antoine Henri Becquerel accidentally found that a uranium-rich mineral called pitchblende emitted invisible, penetrating rays that could darken a photographic plate enclosed in an opaque envelope. This means that rays carry energy, but pitchblende emits them continuously without any energy input. This is an apparent violation of the law of conservation of energy.
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The learning objectives in this section will help your students master the following standards:. Unstable nuclei decay. However, some nuclides decay faster than others. For example, radium and polonium, discovered by Marie and Pierre Curie, decay faster than uranium. That means they have shorter lifetimes, producing a greater rate of decay.
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