If of a radioactive substance has a half-life of , what will be the half-life of a sample of the ide — Nuclear Chemistry and Radioactivity Chemistry Question
Question
If $5\text{ g}$ of a radioactive substance has a half-life of $14\text{ hours}$, what will be the half-life of a $20\text{ g}$ sample of the identically same substance under the same conditions?
Answer: D
💡 Solution & Explanation
Radioactive decay is a first-order process. For any first-order reaction, the half-life ($T_{1/2} = 0.693/\lambda$) is a constant and is entirely independent of the initial amount or concentration. Therefore, the half-life remains $14\text{ hours}$.
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