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MCAT Chemical and Physical Foundations of Biological Systems Flashcards: 4e Nuclear Decay Radioactivity

Study 4e Nuclear Decay Radioactivity in MCAT Chemical and Physical Foundations of Biological Systems with focused flashcards that help you recognize the idea, recall the key rule, and apply it in practice-style prompts.

QUESTION

What is the relationship between half-life t1/2t_{1/2} and decay constant λ\lambda?

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ANSWER

t1/2=ln⁡2λt_{1/2}=\frac{\ln 2}{\lambda}. Half-life inversely relates to the decay constant, where ln2ln 2 arises from solving for half remaining nuclei.

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MCAT Chemical and Physical Foundations of Biological Systems: Foundational Concepts

You are hereNuclear Decay and Radioactivity (4E)25 cards

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What this deck covers

This deck focuses on 4e Nuclear Decay Radioactivity, giving you a quick way to review the definitions, rules, and examples that matter most for MCAT Chemical and Physical Foundations of Biological Systems.

How to use these flashcards

Work through these flashcards in short sessions. Try to answer each prompt before flipping the card, then revisit any cards you miss until the explanation feels automatic.

Practice questions

1 of 50Practice questions for this set
A radiopharmacy prepares 125I^{125}\text{I} seeds for brachytherapy; 125I^{125}\text{I} decays by electron capture to 125Te^{125}\text{Te}. The half-life is 59 days. Two identical sealed seeds are stored: Seed 1 is stored for 59 days; Seed 2 is stored for 118 days. What prediction can be made about the decay rate (activity) of Seed 2 relative to Seed 1 at the time of use, assuming identical initial activity?
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