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Section 1

Radioactivity

Book Version 33
By Boundless
Boundless Chemistry
Chemistry
by Boundless
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5 concepts
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Discovery of Radioactivity

Becquerel accidentally found that a uranium-rich mineral emitted invisible, penetrating rays that could darken a photographic plate.

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Modes of Radioactive Decay

Radioactive decay occurs when an unstable atomic nucleus emits particles or light waves.

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Rate of Radioactive Decay

Radioactive decay rate is exponential and is characterized by constants, such as half-life, as well the activity and number of particles.

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Half-Life of Radioactive Decay

The half-life is a parameter for the rate of decay that is related to the decay constant by: ${t}_{\frac{1}{2}}=\frac{ln2}{\lambda}$ .

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Dating Using Radioactive Decay

Radiometric dating is used to date materials using the decay rate of a radioactive isotope.

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